libclc: Add clspv64 target

Add a variant of the clspv target that is built using spir64.
This is a pre-requisite to supporting spir64 in clspv which is
required to take advantage of SPV_KHR_physical_storage_buffer which
in turn enables more OpenCL C programs to be compiled with clspv.

GitOrigin-RevId: ec0a880d54632923b4d0742f38d565830fc0d0e0
2 files changed