Change name of droiddoc target output to *-stubs.srcjar

Test: m -j core-docs
Bug: b/70351683
Change-Id: I3fa696517175764b64a3b66d25ab04f02e561e51
diff --git a/core/soong_java_prebuilt.mk b/core/soong_java_prebuilt.mk
index f10da32..2242582 100644
--- a/core/soong_java_prebuilt.mk
+++ b/core/soong_java_prebuilt.mk
@@ -24,8 +24,8 @@
 $(eval $(call copy-one-file,$(LOCAL_PREBUILT_MODULE_FILE),$(full_classes_pre_proguard_jar)))
 
 ifdef LOCAL_DROIDDOC_STUBS_JAR
-$(eval $(call copy-one-file,$(LOCAL_DROIDDOC_STUBS_JAR),$(OUT_DOCS)/$(LOCAL_MODULE)-stubs.jar))
-ALL_DOCS += $(OUT_DOCS)/$(LOCAL_MODULE)-stubs.jar
+$(eval $(call copy-one-file,$(LOCAL_DROIDDOC_STUBS_JAR),$(OUT_DOCS)/$(LOCAL_MODULE)-stubs.srcjar))
+ALL_DOCS += $(OUT_DOCS)/$(LOCAL_MODULE)-stubs.srcjar
 endif
 
 ifdef LOCAL_DROIDDOC_DOC_ZIP