Re-enable check for deterministic compilation in the tools=R,stdlib=RD job.

Let's give it another try since the (known) non-deterministic behaviors are fixed now.

Author: eeckstein

utils/build-presets.ini

@@ -214,6 +214,7 @@ dash-dash
 skip-test-ios-host
 skip-test-tvos-host
 skip-test-watchos-host
+check-incremental-compilation
 
 
 [preset: buildbot,tools=RA,stdlib=RDA]