ps_image shader compilation failure with ambiguous function _intersect_rect

[staktrace]

Same deal as #1324, but a different function. Log is at https://treeherder.mozilla.org/logviewer.html#?job_id=103827367&repo=try&lineNumber=2287

[staktrace]

@kvark - we're hitting shader compilation crashes in the wild too - https://bugzilla.mozilla.org/show_bug.cgi?id=1370104 so it would be good to fix this soon and push a new WR update into gecko.

[kvark]

I believe this is fixed in 9143f1d

[staktrace]

Confirmed fixed, thanks!