sunxi-mali: bug fixes for pc and init script

fix bad escape sequences in init script and add correct lib for pc file.

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>