Implement aeabi_{f,d}cmp*.

Special thanks to Anton for the review.

llvm-svn: 174596
diff --git a/compiler-rt/lib/comparesf2.c b/compiler-rt/lib/comparesf2.c
index 3f2e358..c1c3a47 100644
--- a/compiler-rt/lib/comparesf2.c
+++ b/compiler-rt/lib/comparesf2.c
@@ -106,6 +106,8 @@
     }
 }
 
+ARM_EABI_FNALIAS(fcmpun, unordsf2)
+
 int __unordsf2(fp_t a, fp_t b) {
     const rep_t aAbs = toRep(a) & absMask;
     const rep_t bAbs = toRep(b) & absMask;