Simplify memory management in NestedNameSpecifierLocBuilder.

With this change the memory of buffer in NestedNameSpecifierLocBuilder
is allocated in one place. It also prevents from allocation of tiny blocks.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213178 91177308-0d34-0410-b5e6-96231b3b80d8
Don't use -msse2 in test/Driver/cl-options.c

It's already tested in cl-x86-flags.c, and can only be used
when targeting X86.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213179 91177308-0d34-0410-b5e6-96231b3b80d8
Add the --target option to clang-cl and use it to fix a test.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213180 91177308-0d34-0410-b5e6-96231b3b80d8