contrib: Error out if ct-ng build fails

Make sure we catch build failures.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

contrib/linux_build_toolchain.sh

@@ -129,7 +129,7 @@ EOF
 "${CT_NG}" distclean
 "${CT_NG}" defconfig DEFCONFIG=build.config
 
-"${CT_NG}" build
+"${CT_NG}" build || exit 1
 
 chmod -R u+w "${TOOLCHAIN_OUTPUT_DIR}"