update for general build, using glibc-compat, to solve issue #73

[word-sys]

Vendors glibc-compat (https://github.com/billziss-gh/glibc-compat) to pin
symbol versions to GLIBC 2.17 in static Linux builds, making the binary
portable across older distributions without tying the build to a specific
distro baseline

Changes:

• Vendor glibc-2.17.h into launcher/third-party/glibc-compat/
• Update bindist-gcc-static.sh to force-include the compat header via -include
• Exclude third-party/ from build2 directory glob
  Only affects release packaging (bindist-gcc-static.sh). Normal builds unchanged

Closes #73

NOTE: glibc-compat does NOT include LICENSE file on repository, idk how to handle it so im leaving it to actual devs. Also i dont have proper test enviroment, builds seems to be fine but needs check-up first

[wroyca]

Thank! You can ignore the failing CI here. Look like something changed with odb upstream that break our build. Will take a look when time permits.

[word-sys]

All right then, i hope next build will run on Ubuntu 22, have a great day