Enabling new tool chain

Adding support to 2ND_TARGET_GCC_VERSION

Change-Id: I9917d39abb6c7173795509031465b85f1e2a3afe
diff --git a/AndroidBoot.mk b/AndroidBoot.mk
index 6ddf49d..089c4d8 100644
--- a/AndroidBoot.mk
+++ b/AndroidBoot.mk
@@ -1,6 +1,10 @@
 #Android makefile to build lk bootloader as a part of Android Build
 
+ifndef 2ND_TARGET_GCC_VERSION
 CROSS_COMPILE := ../../../prebuilts/gcc/linux-x86/arm/arm-eabi-$(TARGET_GCC_VERSION)/bin/arm-eabi-
+else
+CROSS_COMPILE := ../../../prebuilts/gcc/linux-x86/arm/arm-eabi-$(2ND_TARGET_GCC_VERSION)/bin/arm-eabi-
+endif
 
 # Set flags if we need to include security libs
 ifeq ($(TARGET_BOOTIMG_SIGNED),true)