softfloat: update sources to upstream version.

Change-Id: Idda2ad70b5ccd6101b49820b8c99ad8df3dee4ca
diff --git a/Makefile.android b/Makefile.android
index 73013e3..562da37 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -148,7 +148,7 @@
 #
 MY_CFLAGS += -Wall $(GCC_W_NO_MISSING_FIELD_INITIALIZERS)
 
-# Needed to build fpu/softfloat-native.h properly
+# Needed to build block.c on Linux/x86_64.
 MY_CFLAGS += -D_GNU_SOURCE=1
 
 MY_CFLAGS += -I$(LOCAL_PATH)/include