MAINT: Use 'sha1sum' to calculate diff hash
MAINT: Use 'sha1sum' to calculate diff hash

Using 'git patch-id' ignores changes in white space of
patch that may result in changes not getting
built when you expect them to.

Signed-off-by: Scott Parlane <85029adc3fa41ef14594a57826619713bfe95f25@alliedtelesis.co.nz>

alliedtelesis/buildsyspp,ATL-NZ/buildsyspp