use special cflags for neon

mk/vars.mk

@@ -243,6 +243,10 @@ TARGET_CXXFLAGS+=	-fno-unwind-tables -fno-asynchronous-unwind-tables
 endif
 
 ifeq ($(ADK_TARGET_ARCH_ARM),y)
+ifeq ($(ADK_TARGET_CPU_WITH_NEON),y)
+TARGET_CFLAGS+=		-funsafe-math-optimizations
+TARGET_CXXFLAGS+=	-funsafe-math-optimizations
+endif
 ifeq ($(ADK_TARGET_ARCH_ARM_WITH_THUMB),y)
 TARGET_CFLAGS+=		-mthumb -Wa,-mimplicit-it=thumb
 TARGET_CXXFLAGS+=	-mthumb -Wa,-mimplicit-it=thumb