Add back ARM_EABI_TOOLCHAIN.

ARM_EABI_TOOLCHAIN is still used by the kernel build.

Change-Id: I5cdad0b478c0836e06a2af567e4e212602da1f3b
diff --git a/envsetup.sh b/envsetup.sh
index d3344d2..dee328a 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -131,6 +131,21 @@
         export ANDROID_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
     fi
 
+    export ARM_EABI_TOOLCHAIN=
+    case $ARCH in
+        x86) toolchaindir=x86/i686-eabi-4.4.3/bin
+            ;;
+        arm) toolchaindir=arm/arm-eabi-4.6/bin
+            ;;
+        *)
+            echo "Can't find toolchain for unknown architecture: $ARCH"
+            toolchaindir=xxxxxxxxx
+            ;;
+    esac
+    if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
+        export ARM_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
+    fi
+
     export ANDROID_TOOLCHAIN=$ANDROID_EABI_TOOLCHAIN
     export ANDROID_QTOOLS=$T/development/emulator/qtools
     export ANDROID_BUILD_PATHS=:$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN:$ARM_EABI_TOOLCHAIN$CODE_REVIEWS