Add more permission for linkerconfig

Additional permission is required for linkerconfig from domain to get
access to ld.config.txt file from linker. This change allows linker to
get /dev/linkerconfig/ld.config.txt

Bug: 138920271
Test: m -j && confirmed from cuttlefish
Change-Id: Id130a072add8ae82840b0b4d9e997e146f502124
1 file changed