Re-enable #pragma openmp as suggested by Duncan Sands

- openmp is supported by dragonegg
- #pragma openmp is ignored by clang


git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@173057 91177308-0d34-0410-b5e6-96231b3b80d8
add -lstdc++ to smallpt LDFLAGS

- necessary when TEST=profile

Patch from Alastair Murray


git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@173059 91177308-0d34-0410-b5e6-96231b3b80d8