Revert "Support cross linking to arm on ubuntu."

This reverts commit r193528 (and fixes).

It broke Chandler's setup.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193554 91177308-0d34-0410-b5e6-96231b3b80d8
Switch %clang -cc1 tests to %clang_cc1

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193561 91177308-0d34-0410-b5e6-96231b3b80d8