gv100/ir: Initialize CodeEmitterGV100 members in constructor.
Fix defects reported by Coverity Scan.
uninit_member: Non-static class member prog is not initialized in this constructor nor in any functions that it calls. uninit_member: Non-static class member insn is not initialized in this constructor nor in any functions that it calls.
Signed-off-by: Vinson Lee vlee@freedesktop.org