Makefile: update arm64 paths + v1.5.3 prepare

[thepwagner]

• Run make gem locally.
• Realize some paths have changed (or might have never worked :face-palm:), update them.
• Don't use the --snapshot flag, as even when the current worktree is a clean tag it adds extra noise.
• Do maintain VERSION, as this is what the gem build uses to version itself.

The underlying goal is to synchronize the version uploaded to rubygems with the version available on GitHub.

[thepwagner]

$ git tag v1.5.3
$ make gem deb >/dev/null
$ file dist/ejson_1.5.3_linux_amd64.deb
dist/ejson_1.5.3_linux_amd64.deb: Debian binary package (format 2.0), with control.tar.gz, data compression gz

$ tar xvvf pkg/ejson-1.5.3.gem && tar xvvzf data.tar.gz
x -r--r--r--  0 wheel  wheel     556  4 Nov 14:39 metadata.gz
x -r--r--r--  0 wheel  wheel 7944365  4 Nov 14:39 data.tar.gz
x -r--r--r--  0 wheel  wheel     298  4 Nov 14:39 checksums.yaml.gz
x -rw-r--r--  0 wheel  wheel    1064  4 Nov 14:39 LICENSE.txt
x -rwxr-xr-x  0 wheel  wheel     486  4 Nov 14:39 bin/ejson
x -rwxr-xr-x  0 wheel  wheel 3923120  4 Nov 14:39 build/darwin-amd64/ejson
x -rwxr-xr-x  0 wheel  wheel 3862946  4 Nov 14:39 build/darwin-arm64/ejson
x -rwxr-xr-x  0 wheel  wheel 3813538  4 Nov 14:39 build/freebsd-amd64/ejson
x -rwxr-xr-x  0 wheel  wheel 3838104  4 Nov 14:39 build/linux-amd64/ejson
x -rwxr-xr-x  0 wheel  wheel 3735704  4 Nov 14:39 build/linux-arm64/ejson
x -rw-r--r--  0 wheel  wheel     697  4 Nov 14:39 ejson.gemspec
x -rw-r--r--  0 wheel  wheel      37  4 Nov 14:39 lib/ejson/version.rb

$ file build/*/ejson
build/darwin-amd64/ejson:  Mach-O 64-bit executable x86_64
build/darwin-arm64/ejson:  Mach-O 64-bit executable arm64
build/freebsd-amd64/ejson: ELF 64-bit LSB executable, x86-64, version 1 (FreeBSD), statically linked, for FreeBSD 12.3, FreeBSD-style, Go BuildID=kQuW6paitirv7GY4bem1/q_B2llMCDzE8HKDzlpBD/Gf75HS-6oiA8-hPyYU8G/qxuwjDJnWYUUgQnSxC-5, stripped
build/linux-amd64/ejson:   ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=18dFFrwf9uwIEajiaVrc/NRmPRZyEWyxBz3E0Enaa/GCsiz64jQmRwG3ubHFLT/htFy_VKaaQ3JoVHcgzOc, stripped
build/linux-arm64/ejson:   ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, Go BuildID=vzoiGxEl254ZsRIAJ3MY/0xAbkw5dv2m06XsqKiYk/-zYuNoYMn-rMuXptut-5/8wNagUDo7kQ1dXtktd_F, stripped

$ build/darwin-arm64/ejson --version
ejson version 1.5.3

[PeteMango]

looks good!