Tidy MIPS floating point helpers.

Fix initialization bug in thread.cc.

Change-Id: Ibdc81d6f5c8b1a245044bf901003179167a5d4f1
diff --git a/src/thread.cc b/src/thread.cc
index 48b8645..ee3bf26 100644
--- a/src/thread.cc
+++ b/src/thread.cc
@@ -93,10 +93,10 @@
   pDdiv = __divdf3;
   pDmul = muldf3;
   pFmod = fmod;
-  pCmplFloat = art_cmpl_float;
-  pCmpgFloat = arg_cmpl_float;
-  pCmplDouble = art_cmpl_double;
-  pCmpgDouble = arg_cmpl_double;
+  pCmpgFloat = artCmpgFloat;
+  pCmplFloat = artCmplFloat;
+  pCmpgDouble = artCmpgDouble;
+  pCmplDouble = artCmplDouble;
 #endif
 #if defined(__arm__)
   pShlLong = art_shl_long;