Use correct path for soong_build_metrics.pb when dist is enabled

When dist is enabled soong_build_metrics.pb is written to $DIST_DIR/logs,
not $OUT_DIR.

Test: m dist nothing, examine out/dist/logs/bulid.trace.gz
Change-Id: Ia41de6c838ecbcf0acca1e7ec7e68ba24dce2b32
diff --git a/ui/build/soong.go b/ui/build/soong.go
index abdfeda..90f1798 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -759,7 +759,7 @@
 		return
 	}
 
-	metricsData, err := os.ReadFile(config.SoongBuildMetrics())
+	metricsData, err := os.ReadFile(soongBuildMetricsFile)
 	if err != nil {
 		ctx.Verbosef("Failed to read %s: %s", soongBuildMetricsFile, err)
 		return