Add Static Analyzer section to the Release Notes for clang 3.3

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@180582 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r180263. It's causing failures.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@180583 91177308-0d34-0410-b5e6-96231b3b80d8