Update libm to the upstream head (2014.03.13)

The most relevant changes are the ones in s_erff.c which should improve
the overall speed of exececution and the maximum error in ULP.

Change-Id: I7bd867f902db418db67f02cd58578624357b1ee8
diff --git a/libm/upstream-freebsd/lib/msun/src/math_private.h b/libm/upstream-freebsd/lib/msun/src/math_private.h
index 8ebc7fb..8af2c65 100644
--- a/libm/upstream-freebsd/lib/msun/src/math_private.h
+++ b/libm/upstream-freebsd/lib/msun/src/math_private.h
@@ -39,7 +39,7 @@
  */
 
 #ifdef __arm__
-#if defined(__VFP_FP__)
+#if defined(__VFP_FP__) || defined(__ARM_EABI__)
 #define	IEEE_WORD_ORDER	BYTE_ORDER
 #else
 #define	IEEE_WORD_ORDER	BIG_ENDIAN