[ms-cxxabi] Fix a number of bugs in the mangler.

This includes the following fixes:
 - Implement 4 subtly different variants of qualifier mangling and use them
   in what I believe are the right places.
 - Fix handling of array types.  Previously we were always decaying them,
   which is wrong if the type appears as a template argument, pointee,
   referent etc.
Fixes PR13182.

Differential Revision: http://llvm-reviews.chandlerc.com/D709

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180250 91177308-0d34-0410-b5e6-96231b3b80d8
Fix scrolling bug in clang-format's emacs integration.

This patch ensure that nothing scrolls even if the same buffer is opened
in multiple windows.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180252 91177308-0d34-0410-b5e6-96231b3b80d8
Add option to align escaped newlines left.

This enables formattings like:

  #define A   \
    int aaaa; \
    int b;    \
    int ccc;  \
    int dddddddddd;

Enabling this for Google/Chromium styles only as I don't know whether it
is desired for Clang/LLVM.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180253 91177308-0d34-0410-b5e6-96231b3b80d8
Don't mark 'extern "C" void f(void)' as having extern storage class.

Instead, we check for one line extern "C" context in linkage computation and
when deciding if a variable is a definition.

This hopefully completes the transition to having "as written" semantics for
hasExternalStorage.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180258 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a case in linkage computation that should check for single line extern "C".

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180263 91177308-0d34-0410-b5e6-96231b3b80d8
Improve clang-format's memoization behavior.

Deeply nested expressions basically break clang-format's memoization.
This patch slightly improves the situations and makes expressions like

  aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
      aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
          aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
              aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(
                  aaaaa(aaaaa())))))))))))))))))))))))))))))))))))))));

work.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180264 91177308-0d34-0410-b5e6-96231b3b80d8