This patch adds lambda support to the static analyzer.
All of my initial tests are passed.
Before this patch each time a LambdaExpr was encountered a sink node was generated. This also reduced the coverage of code that is actually not inside a lambda operator(). Also the lack of lambda support is a known cause of some false positives (for example in the dead store checker).
This is a work in progress version of this patch, I will move this feature behind a flag and run it on LLVM to make sure it is also tested with real world code.