Make clang to mark static stack allocations with lifetime markers to enable a more aggressive stack coloring.
Patch by John McCall with help by Shuxin Yang.
rdar://13115369



git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@177819 91177308-0d34-0410-b5e6-96231b3b80d8