checkkconfigsymbols.py: find relevant commits
checkkconfigsymbols.py: find relevant commits

Add option -f/--find to find relevant commits when using the --diff
option.  --find is useful in case a user wants to check commits that
potentially cause a Kconfig symbol to be missing.  This is done via 'git
log -G $SYMBOL' (i.e., to get a list of commits that change $SYMBOL).
The relevant commits are printed below the "SYMBOL\tFILES" line,
followed by an empty line to increase readability.

Signed-off-by: Valentin Rothberg <d484ff0dce8fd014bfe319bab334c357ca5afaee@gmail.com>
Acked-by: Stefan Hengelein <94b6d3dbb615725eba83731b84986d299feaad1e@fau.de>
Acked-by: Andreas Ruprecht <c06520f50e2024ea9461c754d7d849379eb91be6@fau.de>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs