Support cross linking to arm on ubuntu.

With this patch we correctly determine that ubuntu's ARM tree is not biarch
and use "lib" istead of "lib32".

Without this patch the search inside the arm tree for the crt files was failing
and we would end up trying to use the i686 ones in lib32.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193528 91177308-0d34-0410-b5e6-96231b3b80d8
Relax test to pass with windows paths.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193532 91177308-0d34-0410-b5e6-96231b3b80d8
More windows path handling.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193533 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a parser crash when there are #pragmas in a context which requires a single
statement (after a case label, if, etc). Patch by Olivier Goffart!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193545 91177308-0d34-0410-b5e6-96231b3b80d8
Allow a new syntax in a module requires-declaration:

  requires ! feature

The purpose of this is to allow (for instance) the module map for /usr/include
to exclude <tgmath.h> and <complex.h> when building in C++ (these headers are
instead provided by the C++ standard library in this case, and the glibc C
<tgmath.h> header would otherwise try to include <complex.h>, resulting in a
module cycle).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193549 91177308-0d34-0410-b5e6-96231b3b80d8
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