The `PRINT_EACH_EXECUTED_INSTRUCTION` preprocessor flag complements the existing `PRINT_EACH_PROCESSED_INSTRUCTION` flag to print each instruction before they are executed.
This is exceptionally helpful when debugging the debugger.

Bug: b/148401179
Change-Id: If35728f115d664c1dba63e625eefccac9d3140ce
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/42249
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>