make NDEBUG version of UNIMPLEMENTED() macro variadic too
make NDEBUG version of UNIMPLEMENTED() macro variadic too

Change-Id: Ib5e2ec3c443955aefe8b001b926469b9ce5accff
Reviewed-on: https://swiftshader-review.googlesource.com/c/23828
Tested-by: Chris Forbes <c3279c50043e18e9442c1ae071cafa0e7a4ca967@google.com>
Reviewed-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>

bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader,google/swiftshader