Bring bindgen up-to-date and add some fixes

[m8nmueller]

• API changes of scala-native (renaming to unsafe, casts, array typing, struct field access, alloc call)
• a segfault in bindgen/ir/Record.cpp (for unknown reasons, I have to admit)
• illegal scala code generated for anonymous struct members (as used for unions)

[m8nmueller]

Segfault appeared:

Program received signal SIGSEGV, Segmentation fault.
0x000000000046249c in Record::usesType(std::shared_ptr<Type const> const&, bool, std::vector<std::shared_ptr<Type const>, std::allocator<std::shared_ptr<Type const> > >&) const ()
(gdb) bt 10
#0  0x000000000046249c in Record::usesType(std::shared_ptr<Type const> const&, bool, std::vector<std::shared_ptr<Type const>, std::allocator<std::shared_ptr<Type const> > >&) const ()
#1  0x000000000047a4bc in TypeDef::usesType(std::shared_ptr<Type const> const&, bool, std::vector<std::shared_ptr<Type const>, std::allocator<std::shared_ptr<Type const> > >&) const ()
#2  0x00000000004580ac in IR::isTypeUsed(std::shared_ptr<Type const> const&, std::vector<std::shared_ptr<Type const>, std::allocator<std::shared_ptr<Type const> > >&) const ()
#3  0x0000000000454934 in IR::shouldOutput(std::shared_ptr<LocatableType const> const&, std::vector<std::shared_ptr<Type const>, std::allocator<std::shared_ptr<Type const> > >&) const ()
#4  0x0000000000453624 in operator<<(llvm::raw_ostream&, IR const&) ()
#5  0x0000000000426248 in main ()

With debug symbols:

Program received signal SIGSEGV, Segmentation fault.
Record::usesType (this=<optimized out>, type=warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<const Type> (use count 4, weak count 1) = {...}, stopOnTypeDefs=<optimized out>, visitedTypes=...)
    at /tmp/nix-build-scala-native-bindgen-0.1.0.drv-0/bindgen/ir/Record.cpp:37
37	/tmp/nix-build-scala-native-bindgen-0.1.0.drv-0/bindgen/ir/Record.cpp: No such file or directory.
(gdb) f
#0  Record::usesType (this=<optimized out>, type=warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<const Type> (use count 4, weak count 1) = {...}, stopOnTypeDefs=<optimized out>, visitedTypes=...)
    at /tmp/nix-build-scala-native-bindgen-0.1.0.drv-0/bindgen/ir/Record.cpp:37
warning: Source file is more recent than executable.
37	        if (*field->getType() == *type ||
(gdb) print field
$1 = warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Field, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Field, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<Field> (use count 1, weak count 0) = {get() = 0x2727d7a0}

(gdb) print *field
$2 = {<TypeAndName> = {name = <incomplete type>, type = std::shared_ptr<const Type> (empty) = {get() = 0x0}}, offsetInBits = 0}

(gdb) print type
$3 = warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<const Type> (use count 4, weak count 1) = {get() = 0x26f46fa8}
(gdb) print *type
$4 = {<std::enable_shared_from_this<Type>> = {_M_weak_this = warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_ptr_inplace<Enum, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::weak_ptr<Type> (use count 4, weak count 1) = {get() = 0x26f46fa8}}, _vptr$Type = 0x14131a0 <vtable for Enum+208>}

[WojciechMazur]

Looks good, thank you for making it up to date with latest Scala Native.

[WojciechMazur]

I believe the changes should be also applied to tests, it's not catched becouse CI is broken and would require moving it from Travis to GHA. I would not be able to allocate a time for that soon.
Because this project is severely outdated and unmaintained I recommend to use an alternative https://github.com/indoorvivants/sn-bindgen