Bug 1430792 - ExampleStylesheet.h should not be formatted r=andi

MozReview-Commit-ID: 33I2vh3V4pj

--HG--
extra : rebase_source : 723b977df03cdb91df4b0665c2368e17cb247506

.clang-format-ignore

@@ -7,6 +7,7 @@ dom/base/test/.*
 dom/bindings/test/.*
 dom/media/gtest/.*
 gfx/testsd/.*
+.*/gtest/ExampleStylesheet.h
 image/test/.*
 ipc/ipdl/test/.*
 ipc/testshell/.*