Add libion.so to vndk-sp

This commit adds libion.so to VNDK-SP so that some vendor's
gralloc.${chipset}.so can run without problems.

Bug: 62280700
Test: Boots a device from our partners
Merged-In: Ib745dfe52107d792296426b097e13b7c7755d88c
Merged-In: I2bcfe40ed9342de6d81dd310313e984a2c64964b
Change-Id: If30657b93157a2abea29fadcdb0004b37ad9eaf2
1 file changed