Merge branch 'sg/coccicheck-updates'

Update the way we use Coccinelle to find out-of-style code that need to be modernised. * sg/coccicheck-updates: coccinelle: extract dedicated make target to clean Coccinelle's results coccinelle: put sane filenames into output patches coccinelle: exclude sha1dc source files from static analysis coccinelle: use $(addsuffix) in 'coccicheck' make target coccinelle: mark the 'coccicheck' make target as .PHONY