travis: Fix the git push command
travis: Fix the git push command

The previous commit removed a - from --force.

timvideos/HDMI2USB-jahanzeb-firmware,mithro/HDMI2USB,rohit91/HDMI2USB,rohit91/HDMI2USB,timvideos/HDMI2USB-jahanzeb-firmware,rohit91/HDMI2USB,rohit91/HDMI2USB,mithro/HDMI2USB,mithro/HDMI2USB,mithro/HDMI2USB,timvideos/HDMI2USB-jahanzeb-firmware,timvideos/HDMI2USB-jahanzeb-firmware,mithro/HDMI2USB,rohit91/HDMI2USB,timvideos/HDMI2USB-jahanzeb-firmware