Make yasm's re2c output deterministic.

re2c writes the generation date to its output files inside a comment,
which causes unnecessary cache misses when re-building. The old version
of re2c bundled with yasm does not include the --no-generation-date flag,
so let's just patch out the date.

If the version of re2c bundled in yasm is ever updated, we should of
course simply drop this patch and use --no-generation-date.

Change-Id: I931209535ea9371ee0cd3152541e681bc5221fb0
1 file changed