Common: kernel: set default cross compiler to arm-eabi-4.8

Change-Id: I786192bf32d5b191bda8397952c8cec87b2a5f1f
Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/229930


Reviewed-by: jay_chuang <jay_chuang@asus.com>
Tested-by: jay_chuang <jay_chuang@asus.com>
Reviewed-by: Eric1 Lin <Eric1_Lin@asus.com>

AndroidKernel.mk

@@ -35,7 +35,7 @@ endif
 
 TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX))
 ifeq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),)
-KERNEL_CROSS_COMPILE := arm-eabi-
+KERNEL_CROSS_COMPILE := $(ANDROID_BUILD_TOP)/prebuilts/gcc/linux-x86/arm/arm-eabi-4.8/bin/arm-eabi-
 else
 KERNEL_CROSS_COMPILE := $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)
 endif