Adding fixed vkCmdBlitImage usage in observeFramebuffer.
Adding fixed vkCmdBlitImage usage in observeFramebuffer.

Swiftshader was failing because of this.

pmuetschard/gapid,google/gapid,google/gapid,google/gapid,pmuetschard/gapid,google/gapid,pmuetschard/gapid,google/gapid,pmuetschard/gapid,google/agi,google/agi,google/gapid,google/agi,pmuetschard/gapid,google/agi,google/agi,google/gapid,pmuetschard/gapid,pmuetschard/gapid,google/gapid,google/agi,pmuetschard/gapid,google/agi,google/agi