fix frv uclibc-ng testing

embedded-test.sh

@@ -401,7 +401,7 @@ get_arch_info() {
       allowed_libc="uclibc-ng newlib"
       runtime_test=""
       allowed_tests="toolchain"
-      default_glibc="ADK_APPLIANCE=toolchain ADK_TARGET_OS=linux ADK_TARGET_ARCH=frv ADK_TARGET_SYSTEM=generic-frv"
+      default_uclibc_ng="ADK_APPLIANCE=toolchain ADK_TARGET_OS=linux ADK_TARGET_ARCH=frv ADK_TARGET_SYSTEM=generic-frv"
       default_newlib="ADK_APPLIANCE=toolchain ADK_TARGET_OS=baremetal ADK_TARGET_ARCH=frv"
       ;;
     ia64)