Fix PR4296: Add parser detection/error recovery for nested functions, from Serve Pavlov!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179603 91177308-0d34-0410-b5e6-96231b3b80d8
Remove setjmp.h header file from Sema/return.c test and include necessary
declarations explicitly in the test.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179604 91177308-0d34-0410-b5e6-96231b3b80d8