Fix ninja build for Android after http://codereview.chromium.org/10836080/

CC/CXX/AR now refer to target compilation.
We need to specifically set the host toolchain (CC_host, CX_host, AR_host) as well.

Review URL: https://chromiumcodereview.appspot.com/10836192

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151110 0039d316-1c4b-4281-b951-d872f2087c98

build/android/envsetup.sh

@@ -95,10 +95,13 @@ if [[ -d $GOMA_DIR ]]; then
 fi
 export ANDROID_GOMA_WRAPPER
 
-export CC_target=$(basename ${ANDROID_TOOLCHAIN}/*-gcc)
-export CXX_target=$(basename ${ANDROID_TOOLCHAIN}/*-g++)
-export LINK_target=$(basename ${ANDROID_TOOLCHAIN}/*-gcc)
-export AR_target=$(basename ${ANDROID_TOOLCHAIN}/*-ar)
+export CC=$(basename ${ANDROID_TOOLCHAIN}/*-gcc)
+export CXX=$(basename ${ANDROID_TOOLCHAIN}/*-g++)
+export LINK=$(basename ${ANDROID_TOOLCHAIN}/*-gcc)
+export AR=$(basename ${ANDROID_TOOLCHAIN}/*-ar)
+export CC_host=gcc
+export CXX_host=g++
+export AR_host=ar
 
 # Performs a gyp_chromium run to convert gyp->Makefile for android code.
 android_gyp() {