Change srcjarDir/stubsDirs to a different name.

Otherwise it might have the chance to clobber each other
if the rules ran at the same time.

Test: m -j docs
Bug: b/119671939
Change-Id: Ia57e62f0899e5c61539516833c6e3db88547932e
diff --git a/java/droiddoc.go b/java/droiddoc.go
index 0c4877a..9cde189 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -1129,9 +1129,9 @@
 		Inputs:      d.Javadoc.srcFiles,
 		Implicits:   implicits,
 		Args: map[string]string{
-			"outDir":        android.PathForModuleOut(ctx, "out").String(),
-			"srcJarDir":     android.PathForModuleOut(ctx, "srcjars").String(),
-			"stubsDir":      android.PathForModuleOut(ctx, "stubsDir").String(),
+			"outDir":        android.PathForModuleOut(ctx, "dokka-out").String(),
+			"srcJarDir":     android.PathForModuleOut(ctx, "dokka-srcjars").String(),
+			"stubsDir":      android.PathForModuleOut(ctx, "dokka-stubsDir").String(),
 			"srcJars":       strings.Join(d.Javadoc.srcJars.Strings(), " "),
 			"classpathArgs": classpathArgs,
 			"opts":          opts,
@@ -1585,7 +1585,7 @@
 		Implicits: append(android.Paths{apiFile, removedApiFile, d.apiFile, d.removedApiFile},
 			implicits...),
 		Args: map[string]string{
-			"srcJarDir":         android.PathForModuleOut(ctx, "srcjars").String(),
+			"srcJarDir":         android.PathForModuleOut(ctx, "apicheck-srcjars").String(),
 			"srcJars":           strings.Join(d.Javadoc.srcJars.Strings(), " "),
 			"javaVersion":       javaVersion,
 			"bootclasspathArgs": bootclasspathArgs,