[PATCH][RESEND] fix compilation error with CROSS_COMPILE

[Wu Fengguang]

        $ make CROSS_COMPILE=x86_64-linux-gnu-
        ...
        cc1: error: unrecognized command line option "-m64"
        cc1: error: unrecognized command line option "-mno-red-zone"
        cc1: error: unrecognized command line option "-mcmodel=kernel"
        cc1: error: unrecognized command line option "-maccumulate-outgoing-args"

Cc: Tiago Maluta <tiago.maluta@xxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---

Andrew: the compile error only occurs in the -mm tree
The bug is introduced by patch "Linux has an recent option to define
CROSS_COMPILE in menuconfig.".

diff --git a/Makefile b/Makefile
index d646d69..af8864e 100644
--- a/Makefile
+++ b/Makefile
@@ -190,7 +190,7 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 export KBUILD_BUILDHOST := $(SUBARCH)
 ARCH		?= $(SUBARCH)
 CROSS_COMPILE	?=
-CROSS_COMPILE	:= $(shell grep CONFIG_CROSS_COMPILE .config | cut -d'"' -f2)
+CROSS_COMPILE	?= $(shell grep CONFIG_CROSS_COMPILE .config | cut -d'"' -f2)
 
 # Architecture as present in compile.h
 UTS_MACHINE 	:= $(ARCH)
--
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