[Ohrrpgce] SVN: teeemcee/12222 scons: don't use "git svn info" at all on any OS, it's so slow

[subversion at HamsterRepublic.com]

teeemcee
2021-02-11 05:04:56 -0800 (Thu, 11 Feb 2021)
385
scons: don't use "git svn info" at all on any OS, it's so slow

Instead, use the "git log --grep ..." fallback already used on Windows.

On my Linux machine, this reduces the time for running "scons unlump" with no
rebuild needed from 1.4s to 0.8s, which feels like a lot in practice.  Because
scons does things in parallel, the reduction for a no-rebuild "scons" is only
1.5s -> 1.3s.
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U   wip/ohrbuild.py