When parsing a function body, add it to the crash stack, giving us something

like:

Stack dump:
0.	t.c:5:10: in compound statement ('{}')
1.	t.c:3:12: in compound statement ('{}')
2.	t.c:3:12: parsing function body 'foo'
3.	clang t.c 
Abort

llvm-svn: 66118