Fix ANGLE in SampleApp

Typo in DLL name meant that we were never running with ANGLE.

Fixing that exposed problem with attachANGLE -> we weren't filling out
attachment info after the first call, resulting in invalid surface
descriptions on windowSizeChanged events.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1892113002

Review URL: https://codereview.chromium.org/1892113002
1 file changed