unit-test: allow non-shell scripts for format extension

Switch the 'format-code.sh' extension to look recursively for any
'format-code.sh' or 'format-code' script.  This allows non-shell
scripts to be used and allows the unit-test extensions to be moved
to a subdirectory (such as .openbmc).

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I2dfed1230bd70b871eca7c5b3d0078786f4d9460
1 file changed