use curl like everything else on vendorsetup.sh

Change-Id: I80bd2f98c15450064cd24a5488de12380a98bf71
tell curl to be quiet in vendorsetup.sh

Change-Id: I0c2310d40a0a783993cb52ea4424aa873265729a
Merge remote-tracking branch 'CyanogenMod/cm-10.1' into cm-10.1