Call nomnom in a subprocess so that it doesn't break the build

bin/compile

@@ -92,11 +92,13 @@ mkdir -p $build_dir/.profile.d
 echo "export PATH=\"\$HOME/vendor/node/bin:\$HOME/bin:\$HOME/node_modules/.bin:\$PATH\"" > $build_dir/.profile.d/nodejs.sh
 
 # Post to nomnom
-curl \
-  --data @$build_dir/package.json \
-  --fail \
-  --silent \
-  --request POST \
-  --header "content-type: application/json" \
-  https://nomnom.heroku.com/?request_id=$REQUEST_ID \
-  > /dev/null
+(
+  curl \
+    --data @$build_dir/package.json \
+    --fail \
+    --silent \
+    --request POST \
+    --header "content-type: application/json" \
+    https://nomnom.heroku.com/?request_id=$REQUEST_ID \
+    > /dev/null
+) &