copy the doxygen tarball into the HTML directory after building it


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24529 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Makefile b/docs/Makefile
index dfdd7ba..92ba961 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -63,6 +63,7 @@
 	$(Verb) $(RM) -rf $@ $(PROJ_OBJ_DIR)/doxygen.tar
 	$(Verb) $(TAR) cf $(PROJ_OBJ_DIR)/doxygen.tar doxygen
 	$(Verb) $(GZIP) $(PROJ_OBJ_DIR)/doxygen.tar
+	$(Verb) $(CP) $(PROJ_OBJ_DIR)/doxygen.tar.gz $(PROJ_OBJ_DIR)/doxygen/html/
 
 userloc: $(LLVM_SRC_ROOT)/docs/userloc.html