Add vendor_available:true to libmemunreachable

Bug: 38244611
Test: build sailfish

Merged-In: I5f238377784b3a30308e9e5cb0817c71675edddf
Change-Id: Ieb7fdcae4b96a1e1622ba98a7cfb56a95b798452
(cherry picked from commit 52eaeb48255082ceaafea20dd9339545b6174fb4)
1 file changed