[CSA] [NFC] Move AnalysisContext.h to AnalysisDeclContext.h

The implementation is in AnalysisDeclContext.cpp and the class is called
AnalysisDeclContext.

Making those match up has numerous benefits, including:

 - Easier jump from header to/from implementation.
 - Easily identify filename from class.

Differential Revision: https://reviews.llvm.org/D37500

llvm-svn: 312671
diff --git a/clang/lib/Analysis/Consumed.cpp b/clang/lib/Analysis/Consumed.cpp
index f6fe78a..19a8567 100644
--- a/clang/lib/Analysis/Consumed.cpp
+++ b/clang/lib/Analysis/Consumed.cpp
@@ -22,7 +22,7 @@
 #include "clang/AST/StmtVisitor.h"
 #include "clang/AST/Type.h"
 #include "clang/Analysis/Analyses/PostOrderCFGView.h"
-#include "clang/Analysis/AnalysisContext.h"
+#include "clang/Analysis/AnalysisDeclContext.h"
 #include "clang/Analysis/CFG.h"
 #include "clang/Basic/OperatorKinds.h"
 #include "clang/Basic/SourceLocation.h"