Move friend warning into CXX11 warning group.

Also, fix the wording to reflect this.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187171 91177308-0d34-0410-b5e6-96231b3b80d8
Partially revert r186903.

It turns out that Plum Hall depends on us not emitting an error on
integer literals which fit into long long, but fit into
unsigned long long.  So C99 conformance requires not conforming to C99. :)

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187172 91177308-0d34-0410-b5e6-96231b3b80d8
Fix GNU ObjC ABI for a message returning a struct.

This allows the ObjFW runtime to correctly implement message forwarding
for messages which return a struct.

Patch by Jonathan Schleifer.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187174 91177308-0d34-0410-b5e6-96231b3b80d8
Fix gcc search for cross-compiler on Ubuntu 13.04.

Just more craziness to find crtbegin.o etc.

Patch by Stephen Kelly.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187175 91177308-0d34-0410-b5e6-96231b3b80d8
Tighten type-checking for vector attributes.

Based on patch by Yunzhong Gao.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@187176 91177308-0d34-0410-b5e6-96231b3b80d8