utils: Exit early on build failure

utils/make_all.rb

@@ -8,6 +8,9 @@ crates.each do |x|
   x = File.dirname(x)
   puts "\n\n" + x.to_s + "\n\n"
   Dir.chdir(x) do
-    `make`
+    if system('make') != 0
+      puts "\n\nBuild failed!"
+      exit(1) # Exit with error code
+    end
   end
 end