Make sphal and vndk namespace available from legacy devices

linkerconfig failed to complete the execution from ARC++ which was
caused by missing vndk variables because ARC++ is legacy device. This
change allows linkerconfig to generate ld.config.txt for SWCodec by
allowing SPHal and VNDK namespaces even from legacy devices

Bug: 149914078
Test: m -j passed
Test: Tested from ARC++ w/ betty
Change-Id: I5412434f0d2b3b69b916ca512828498a7eba72a3
2 files changed