Fixed calculation of penalty when breaking tokens.

Summary:
Introduced two new style parameters: PenaltyBreakComment and
PenaltyBreakString. Add penalty for each character of a breakable token beyond
the column limit (this relates mainly to comments, as they are broken only on
whitespace). Tuned PenaltyBreakComment to prefer comment breaking over breaking
inside most binary expressions.
Fixed a bug that prevented *, & and && from being considered TT_BinaryOperator
in the presense of adjacent comments.

Reviewers: klimek, djasper

Reviewed By: klimek

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D933

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183530 91177308-0d34-0410-b5e6-96231b3b80d8
fix up recogtion of block pointer type in my last patch.
// rdar://14085217.
e-This line, and those below, will be ignored--

M    lib/Sema/SemaExpr.cpp


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183531 91177308-0d34-0410-b5e6-96231b3b80d8