Trusty implementations are provided by vendors. This patch moves
the AOSP reference implementations to the vendor partition.
Bug: 63085384
Test: Build gordon_peak which adopts trusty as the TEE and confirm
that libtrusty and gateway.trusty are moved to /vendor.
Test: Build marlin which does not adopt trusty as the TEE and confirm
that this patch has no effect on the build result.
Test: mmm BOARD_VNDK_VERSION=current system/core/trusty
Change-Id: I7f6d897b86c69d06923a18d28154760e006dd193
