Fix Convolve2dSr Y tests
Fix Convolve2dSr Y tests

The compound tests are not needed for the Sr convolve
functions, and are broken with LOWPRECISION_BLEND.

Change-Id: I426bf872e70fc013cbd38f2bf0585aa920f8debd

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom