git: add test for lca algorithm
git: add tests for adding files with absolute paths.
cmd/git: add tests for export/import
git: add merge tests, clean up basic tests
cmd/git: finish renaming test.rc
date: check for expected time ranges.
seconds, date: test that we round trip on local timezones.
cc: add tests for integer constant types.
Add tests of cyclic defines.
Use a fixed timezone in date tests.
use fixed timezone in parsing code.
guarantee that we round-trip times in tmnorm.
relink test programs on every run
Add test for pow.c (taken from libc/test)
Add tests for c preprocessor
regress: initial commit for date code