Merge "Use --frontend_file for ninja instead of cat"

ui/build/ninja.go

@@ -35,7 +35,7 @@ func runNinja(ctx Context, config Config) {
 	executable := config.PrebuiltBuildTool("ninja")
 	args := []string{
 		"-d", "keepdepfile",
-		fmt.Sprintf("--frontend=cat <&3 >%s", fifo),
+		"--frontend_file", fifo,
 	}
 
 	args = append(args, config.NinjaArgs()...)

ui/build/soong.go

@@ -15,7 +15,6 @@
 package build
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -116,7 +115,7 @@ func runSoong(ctx Context, config Config) {
 			"-d", "keepdepfile",
 			"-w", "dupbuild=err",
 			"-j", strconv.Itoa(config.Parallel()),
-			fmt.Sprintf("--frontend=cat <&3 >%s", fifo),
+			"--frontend_file", fifo,
 			"-f", filepath.Join(config.SoongOutDir(), file))
 		cmd.Sandbox = soongSandbox
 		cmd.RunAndPrintOrFatal()