Fix Mac compilation.

Provide an implementation of MemoryMappingLayout::Error() for Mac.

Change-Id: If2c36df4925990ac1ea5749b89f784e84013ba05
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@350601 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed