Also simplify code so that emitPrintLocation is called, but does nothing
if ENABLE_RR_EMIT_PRINT_LOCATION isn't defined.

Bug: b/159633249
Change-Id: I0e207baf6a0e2eb144e026904357664e1277ebf1
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/45969
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>