changed default optimization flag for ARM from -O2 to -O3

Makefile.system

@@ -830,8 +830,12 @@ COMMON_OPT += -g
 endif
 
 ifndef COMMON_OPT
+ifeq ($(ARCH), arm)
+COMMON_OPT = -O3
+else
 COMMON_OPT = -O2
 endif
+endif
 
 
 override CFLAGS     += $(COMMON_OPT) $(CCOMMON_OPT) -I$(TOPDIR)
@@ -929,6 +933,10 @@ export HAVE_SSE4_2
 export HAVE_SSE4A
 export HAVE_SSE5
 export HAVE_AVX
+export HAVE_VFP
+export HAVE_VFPV3
+export HAVE_VFPV4
+export HAVE_NEON
 export KERNELDIR
 export FUNCTION_PROFILE
 export TARGET_CORE