expose HonorSignDependentRoundingFPMathOption to .td files


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36658 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
index b79b87b..6c00a3f 100644
--- a/lib/Target/TargetMachine.cpp
+++ b/lib/Target/TargetMachine.cpp
@@ -27,6 +27,7 @@
   bool NoExcessFPPrecision;
   bool UnsafeFPMath;
   bool FiniteOnlyFPMathOption;
+  bool HonorSignDependentRoundingFPMathOption;
   bool UseSoftFloat;
   bool NoZerosInBSS;
   bool ExceptionHandling;