Use toybox md5sum instead of md5 on macOS.

Test: builds locally
Change-Id: I04aa52de96e0525a44331cb0c057a8e18a95891d

java/sdk.go

@@ -19,7 +19,6 @@ import (
 	"android/soong/java/config"
 	"fmt"
 	"path/filepath"
-	"runtime"
 	"sort"
 	"strconv"
 	"strings"
@@ -349,15 +348,7 @@ func createAPIFingerprint(ctx android.SingletonContext) {
 
 		cmd.Text("cat").
 			Inputs(android.PathsForSource(ctx, in)).
-			Text("|")
+			Text("| md5sum | cut -d' ' -f1 >").
-
-		if runtime.GOOS == "darwin" {
-			cmd.Text("md5")
-		} else {
-			cmd.Text("md5sum")
-		}
-
-		cmd.Text("| cut -d' ' -f1 >").
 			Output(out)
 	} else {
 		// Unbundled build

ui/build/paths/config.go

@@ -129,12 +129,10 @@ var Configuration = map[string]PathConfig{
 
 func init() {
 	if runtime.GOOS == "darwin" {
-		// TODO: move Darwin off md5 and onto our md5sum prebuilt.
-		Configuration["md5"] = Allowed
 		Configuration["sw_vers"] = Allowed
 		Configuration["xcrun"] = Allowed
 
-		// We don't have darwin prebuilts for some tools (like toybox),
+		// We don't have darwin prebuilts for some tools,
 		// so allow the host versions.
 		for name, config := range Configuration {
 			if config.LinuxOnlyPrebuilt {