test/check-size: show error if make fails

This patch adds an error message when compilation fails when running the
check-size script.

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

test/check-size.sh

@@ -16,7 +16,12 @@ MAX_DIFF=51200
 # Build the checkpointctl binary. If the commit is not self-contained,
 # the build will fail, in which case there is no point checking for a
 # change in the size of the binary.
-make
+if ! make; then
+	echo "ERROR: Compilation failed at $(git rev-parse --short HEAD)"
+	echo "Make sure that the compilation is successful for each commit."
+	exit 1
+fi
+
 # Store the binary size
 BIN_SIZE=$(stat -c%s "$BIN_NAME")
 # Print the size along with the commit hash