API to query whether a given instruction set / abi is 64bit.

This is required to implement some aspects of the multi
lib installation process.

(cherry picked from commit 32f32721e65c93a3aaf8a792b7742aabe7e29e7e)

Change-Id: I10fedcbee1318d132d2ac517ddf8cdca02a51cda
1 file changed