kernel_build: Fix hardcode arch in output

Otherwise it always reports x86_64

Author: bmastbergen

kernel_build.sh

@@ -29,7 +29,7 @@ echo "[TIMER]{MRPROPER}: $(( $END_MRPROPER - $START_MRPROPER ))s"
 ARCH=$(uname -m)
 if [ "x86_64" == "${ARCH}" ] || [ "aarch64" == "${ARCH}" ]; then
     VERSION=$(uname -r | cut -d '-' -f1)
-    echo "x86_64 architecture detected, copying config"
+    echo "${ARCH} architecture detected, copying config"
     if [ -f configs/kernel-${ARCH}.config ]; then
 	cp -v configs/kernel-${ARCH}.config .config
     elif [ -f configs/kernel-${ARCH}-rhel.config ]; then