tests/flip_test: test interaction with panning
tests/flip_test: test interaction with panning

Since panning with set_crtc is synchronous, we need to stall for any
outstanding pageflips. This new testcase exercise that code. Unfortunately
we still need eyes to check whether we don't loose the offset :(

chenxianqin/intel-gpu-tools,yipdw/intel-gpu-tools,ChrisCummins/intel-gpu-tools,rib/intel-gpu-tools,dlespiau/intel-gpu-tools,ChrisCummins/intel-gpu-tools,chenxianqin/intel-gpu-tools,mv0/intel-gpu-tools,dlespiau/intel-gpu-tools,tiagovignatti/intel-gpu-tools,ChrisCummins/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,chenxianqin/intel-gpu-tools,dlespiau/checkmate-test-igt,chenxianqin/intel-gpu-tools,dlespiau/checkmate-test-igt,dlespiau/intel-gpu-tools,yipdw/intel-gpu-tools,erikarn/intel-gpu-tools,erikarn/intel-gpu-tools,yipdw/intel-gpu-tools,erikarn/intel-gpu-tools,tiagovignatti/intel-gpu-tools,ChrisCummins/intel-gpu-tools,yipdw/intel-gpu-tools,mv0/intel-gpu-tools,rib/intel-gpu-tools,mv0/intel-gpu-tools,erikarn/intel-gpu-tools,rib/intel-gpu-tools,mv0/intel-gpu-tools,rib/intel-gpu-tools,dlespiau/checkmate-test-igt,dlespiau/checkmate-test-igt