compiler: use incremental cache mode with -fincremental

This results in correct reporting to the build system of file system
inputs with `-fincremental --watch` on a `fno-emit-bin` build.
d63d9b9918mlugg committed on 8/17/2024, 10:50:10 PM· committed by Jacob Youngparent04b1354
1 file changedLine totals unavailable