[NFC] Invoke lipo from CMAKE_LIPO.

This shouldn't change anything, except that a cmake cache file that specifies
CMAKE_LIPO can specify an alternate lipo to use.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@372790 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed