[analyzer] Make sure scan-build catches all clang failures.

scan-build ignores clang failures in some cases, which might lead to
silent failure suppression. For example, if clang command line
argument is wrong. (Addresses radar://10406598)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144029 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed