Switch libc/libcstdc++/libm to hash-style=both

Bug: http://b/19059885
Change-Id: Ie42703d91f291fd689a1cf9c35bcab5c487b9a84
diff --git a/libm/Android.mk b/libm/Android.mk
index 6472a15..529dda8 100644
--- a/libm/Android.mk
+++ b/libm/Android.mk
@@ -514,7 +514,7 @@
 include $(CLEAR_VARS)
 
 # TODO: This is to work around b/19059885. Remove after root cause is fixed
-LOCAL_LDFLAGS_arm := -Wl,--hash-style=sysv
+LOCAL_LDFLAGS_arm := -Wl,--hash-style=both
 
 LOCAL_MODULE := libm
 LOCAL_CLANG := $(libm_clang)