fast-forward-master.sh: Use a separate dir for R/W clone/push

Currently, when running this script, we get "fatal: destination path
'trusted-firmware-a' already exists and is not an empty directory" error.
Apparently, a dir of this name is already used by R/O checkout for the
build process. So, use another name.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I5d5290acae27331338b715c0dfc3810e795a0295
1 file changed