crystal: update to 0.29.0.

[sebmenard]

I need to figure out what is up with Travis not being enabled for my pull request, but locally the package seems to compile just fine.

...
=> Creating crystal-0.29.0_1.x86_64.xbps for repository /host/binpkgs/crystal-0.29.0 ...
=> crystal-0.29.0_1: running post-pkg hook: 00-register-pkg ...
=> Registering new packages to /host/binpkgs/crystal-0.29.0
index: added `crystal-0.29.0_1' (x86_64).
index: 1 packages registered.

[Hoshpak]

That's strange. Did you also test i686?

[sebmenard]

=> ERROR: crystal-0.29.0_1: cannot be cross compiled, exiting...
=> ERROR: crystal-0.29.0_1: FIXME: someone needs to sort out the llvm --cxxflags for cross building

See template.

[sebmenard]

Sorry for the noise, I tried to create a new pull request in order to try to trigger Travis but still no luck.