Consolidating some mode attribute diagnostics. No functional changes intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197911 91177308-0d34-0410-b5e6-96231b3b80d8
clang/Analysis/FlowSensitive/DataflowSolver.h: <functional> should be just a STL header.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197912 91177308-0d34-0410-b5e6-96231b3b80d8