swift

ef5492d9 - Reduce rebuilds when running buildbot_incremental presets in succession (#69167)

Reduce rebuilds when running buildbot_incremental presets in succession (#69167) We have some configurations in which we run a preset that only builds the compiler, and then a few ones to tests such binary, e.g. ``` buildbot_incremental,tools=RA,stdlib=RD,build buildbot_incremental,tools=RA,stdlib=RD,test=macOS,type=device buildbot_incremental,tools=RA,stdlib=RD,test=iOS,type=simulator buildbot_incremental,tools=RA,stdlib=RD,test=watchOS,type=simulator ``` Contrary to the other presets, in the first preset we did not specify "--lit-args" since it is not necessary -- however that plays a part in the configuration of compiler-rt, causing an unwanted rebuild when that parameter is specified in the following preset. Addresses rdar://116922016