[BSW/BDW] skia lcdblendmode & lcdoverlap test failure
2 skia test gles_lcdblendmode & gles_lcdoverlap fails only in brw/bdw , skl+ works fine.
Image rendered has missing text portion or some extra lines and dots (refer attached image src text)
This happens only for text rendered with blend mode SkBlendMode::kSrc (Replaces destination with source. Destination alpha and color component values are ignored.) all other blend mode works fine
If dri config "always_flush_cache" is set true then these issue is not observed
test lcdblendmode : https://skia.googlesource.com/skia/+/refs/heads/master/gm/lcdblendmodes.cpp
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