am b4918b9a: Build keystore in 32 bit on platforms that require it.

* commit 'b4918b9a2794a2afae08d5f8cddad639011343f1':
  Build keystore in 32 bit on platforms that require it.
tree: 4030fd8a075fad948c0e4ba6ca19110a88273e96
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/