Extend Mac OS versions to Yosemite

This also fixes the test/asan/TestCases/Darwin/malloc_zone-protected.cc test failure on OS X 10.10.

Reviewed at http://reviews.llvm.org/D6119



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@221379 91177308-0d34-0410-b5e6-96231b3b80d8