Add support for static analysis to clang-check

Summary:
This adds a command line argument '-analyze' to clang-check which runs the
clang static analyzer on the source files.

Reviewers: klimek

CC: cfe-commits, revane

Differential Revision: http://llvm-reviews.chandlerc.com/D926

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183399 91177308-0d34-0410-b5e6-96231b3b80d8