This commit adds context sensitive code completion support for the C++11
keywords that currently don't have completion results.
The following keywords are supported by this patch:
alignas
constexpr
static_assert
noexcept (as a function/method qualifier)
thread_local
The following special identifiers are also supported:
final (as a method qualifier or class qualifier)
override
rdar://29219185
Differential Revision: https://reviews.llvm.org/D28286
llvm-svn: 295001