style: Disable camelcase rule for GObject properties

For GObject properties, we follow the convention of all-lowercase,
dash-separated names. Those translate to underscores in getters/setters,
so exempt them from the newly added "camelcase" rule.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/627

js/perf/core.js

@@ -3,6 +3,7 @@
             script_applicationsShowStart, script_applicationsShowDone,
             script_afterShowHide, malloc_usedSize, glx_swapComplete,
             clutter_stagePaintDone */
+/* eslint camelcase: ["error", { properties: "never", allow: ["^script_", "^malloc", "^glx", "^clutter"] }] */
 
 const System = imports.system;