lib/core: Make the start of the debug output more clear
lib/core: Make the start of the debug output more clear

I missed the quiet "Log start" between the test failure and the debug
output (and so was very confused by the repetition). You have to shout
at me!

v2: Thomas suggested I make the end of the logging clear as well. Since
I completely missed that there was a end marker, he must be right!

Signed-off-by: Chris Wilson <711c73f64afdce07b7e38039a96d2224209e9a6c@chris-wilson.co.uk>
Cc: Thomas Wood <b9025d6a953b68f894a0f6a80fd2af6d55b0badd@intel.com>

tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,mv0/intel-gpu-tools,mv0/intel-gpu-tools,dlespiau/checkmate-test-igt,dlespiau/checkmate-test-igt,chenxianqin/intel-gpu-tools,mv0/intel-gpu-tools,mv0/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,chenxianqin/intel-gpu-tools,chenxianqin/intel-gpu-tools,chenxianqin/intel-gpu-tools,dlespiau/checkmate-test-igt,dlespiau/checkmate-test-igt