CMake: Don't run 'git svn' if there is no .git/svn directory.
authorJim Grosbach <grosbach@apple.com>
Mon, 10 Dec 2012 19:03:37 +0000 (19:03 +0000)
committerJim Grosbach <grosbach@apple.com>
Mon, 10 Dec 2012 19:03:37 +0000 (19:03 +0000)
commitf7cbcf2648d7f03eb1a426b70150fec92693df65
treedec166860a0a16828cf4cdb937a91e0c3d029db5
parentc01322ee90f59db8b21c5a5c4bb855a8f291ba5b
CMake: Don't run 'git svn' if there is no .git/svn directory.

If the local checkout does not have 'git svn' references set up, don't try
to use 'git svn' for version information.

llvm-svn: 169749
llvm/cmake/modules/VersionFromVCS.cmake