Add markdown asking user to read the FAQ before submitting a bug #1606

Job	Run time
code formatting check	16s
cppcheck	8m 29s
min features with gcc	1m 32s
min features with g++	2m 9s
min features with clang	2m 1s
max features with gcc	3m 5s
max features with g++	2m 1s
max features with clang	2m 51s
max features with gcc and DEBUG	1m 54s
max features with gcc for 32-bit arch (legacy OS)	1m 40s
max features with g++ for 32-bit arch (legacy OS)	1m 20s
max features with clang for 32-bit arch (legacy OS)	1m 38s
	28m 56s

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