[PATCH] Refactor: Move google clang-tidy checks to namespace clang::tidy::google

[Richard]

================
Comment at: clang-tidy/google/AvoidCStyleCastsCheck.cpp:20
@@ -19,3 +19,3 @@
 namespace tidy {
-namespace readability {
+namespace google {
 
----------------
alexfh wrote:
> LegalizeAdulthood wrote:
> > alexfh wrote:
> > > Please don't remove the "readability" namespace. You can put the "google" namespace around it. Same for other checks.
> > So you'd prefer `clang::tidy::google::readability`?  I can do that.
> Yes, exactly. And the same for `runtime` and `build` namespaces.
Fixed.

http://reviews.llvm.org/D7994

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