Run %clang_cc1, it is the one that actually crashes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186943 91177308-0d34-0410-b5e6-96231b3b80d8
Replacing some manual diagnostic checks with an existing helper method.  Adding missing test cases for the diagnostics.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186944 91177308-0d34-0410-b5e6-96231b3b80d8
Use -### instead of -ccc-echo.

This is still a fairly odd test. Clang wants to run gcc for assembling. At
least with -### it only prints that instead of actually trying to run it with
-ccc-echo.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186945 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing quotes for -###.

Sorry about forgetting to include this in the previous patch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186946 91177308-0d34-0410-b5e6-96231b3b80d8
Fixing the build bots from the previous commit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186947 91177308-0d34-0410-b5e6-96231b3b80d8
Convert another test to -###.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186949 91177308-0d34-0410-b5e6-96231b3b80d8