Tell Linguist that we made our extensions ourselves

ThePsionic · AprilSylph · commit a742733b95aa · 2018-06-13T11:00:37.000+01:00
I got tired of seeing those "Diffs aren't generated for generated files by default" messages so now they should be gone for all extension files.
diff --git a/.gitattributes b/.gitattributes
@@ -176,3 +176,6 @@ Procfile    text
 ## EXECUTABLES
 *.exe binary
 *.pyc binary
+
+## LINGUIST
+Extensions/* linguist-generated=false
