Allow actions to read BUILD_BROKEN_INCORRECT_PARTITION_IMAGES

To maintain good backwards compatibility with the legacy partition
building behavior, allow actions to read
BUILD_BROKEN_INCORRECT_PARTITION_IMAGES so that we don't have to rerun
analysis.

Bug: 205632228
Test: Presubmits
Change-Id: I8b25a62f24bc6d628fb055239b084f6ea535e38b

ui/build/ninja.go

@@ -194,6 +194,10 @@ func runNinjaForBuild(ctx Context, config Config) {
 
 			// LLVM compiler wrapper options
 			"TOOLCHAIN_RUSAGE_OUTPUT",
+
+			// We don't want this build broken flag to cause reanalysis, so allow it through to the
+			// actions.
+			"BUILD_BROKEN_INCORRECT_PARTITION_IMAGES",
 		}, config.BuildBrokenNinjaUsesEnvVars()...)...)
 	}