Update libgit2 to 0.22.x.

[kwm]

Summary

Update libgit2 to the 0.22.x series which brings in API/ABI changes (yay fun).
Update libgit2-glib to 0.22.x series to fix the build with libgit2 0.22.x.
Update gitg to 3.16.1 to make it build agains libgit2-glib 0.22.x.
Update py-pygit2 to 0.22.0.
Update rubygem-rugged to 0.22.1b1 which is a pre-release but it builds with

libgit2 0.22.x..

Test Plan

libgit2, libgit2-glib and gitg are in the GNOME 3.16 repo, and work there.
py-pygit2 and rubygem-rugged need testing. After the rugged port is fixed

since it installs .o files...??

[kwm]

To be clear, I would like help with making sure the py-pygit2 and rubygem port install/work fine.

[mmoll]

Tested with rubygem-rugged, I can browse around in a git repo on irb just fine.
At least for me the rugged 0.21 version we're having in ports right now is showing the same QA problems.

[koobs]

pygit2 test suite runs clean:

Ran 229 tests in 13.441s - OK

I added the following to the port for future testers & QA:

 USE_PYTHON=    autoplist distutils
 MAKE_ENV=      LIBGIT2=${LOCALBASE}

+regression-test: build
+       @cd ${WRKSRC} && ${PYTHON_CMD} ${PYDISTUTILS_SETUP} test
+
 .include <bsd.port.mk>

Shared libraries need to be stripped:

Warning: 'lib/python2.7/site-packages/_pygit2.so' is not stripped consider trying INSTALL_TARGET=install-strip or using ${STRIP_CMD}
Warning: 'lib/python2.7/site-packages/pygit2_cffi_4091df83x5470904.so' is not stripped consider trying INSTALL_TARGET=install-strip or using ${STRIP_CMD}

[kwm]

py-pygit2: Add test command and strip .so files.

[koobs]

LGTM

[swills]

The changes to rubygem-rugged look fine to me.

[kwm]

Committed in revision 386103.