static-checks-include-order.sh: Use current build branch

When testing a patch, run check against current branch being built as
a base revision, instead of hardcoding "origin/master".

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Iaf4013a5fdc35248d97fd97fe2d13e74aa5750a6
1 file changed