make: arm -- Use syscalls-asm-y-asmflags instead of CFLAGS

CFLAGS can be overriden, we need own flags here.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Tested-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

arch/arm/Makefile

@@ -19,8 +19,8 @@ SYS-GEN-TBL	:= gen-sys-exec-tbl.pl
 
 SYS-EXEC-TBL	:= sys-exec-tbl.c
 
-CFLAGS		+= -fpie -Wstrict-prototypes -Wa,--noexecstack
-CFLAGS		+= -nostdlib -fomit-frame-pointer -I$(obj)
+syscalls-asm-y-asmflags		+= -fpie -Wstrict-prototypes -Wa,--noexecstack
+syscalls-asm-y-asmflags		+= -nostdlib -fomit-frame-pointer -I$(obj)
 ASMFLAGS	+= -D__ASSEMBLY__
 
 ARCH_BITS	:= 32