[PATCH] process the -fno-signed-zeros optimization flag (PR20870)

[Sanjay Patel]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6873

Files:
  cfe/trunk/include/clang/Driver/CC1Options.td
  cfe/trunk/include/clang/Driver/Options.td
  cfe/trunk/lib/Driver/Tools.cpp
  cfe/trunk/lib/Frontend/CompilerInvocation.cpp
  cfe/trunk/test/CodeGen/finite-math.c
  cfe/trunk/test/Driver/fast-math.c

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