Bug 1270994 - Re-add webgl-utils.js to .eslineignore because I just intentionally re-broke it CLOSED TREE a=merge

--HG--
extra : source : 2179cd63b7fcdf18f0fa87dbfafb621954623911

.eslintignore

@@ -100,6 +100,7 @@ devtools/client/responsivedesign/**
 devtools/client/scratchpad/**
 devtools/client/shadereditor/**
 devtools/client/shared/*.jsm
+devtools/client/shared/webgl-utils.js
 devtools/client/shared/developer-toolbar.js
 devtools/client/shared/components/test/**
 devtools/client/shared/redux/middleware/test/**