Update buidlroot to version 2016.08.1

bsp/buildroot/package/pkg-download.mk

@@ -76,6 +76,7 @@ export BR_NO_CHECK_HASH_FOR =
 define DOWNLOAD_GIT
 	$(EXTRA_ENV) $(DL_WRAPPER) -b git \
 		-o $(DL_DIR)/$($(PKG)_SOURCE) \
+		$(if $($(PKG)_GIT_SUBMODULES),-r) \
 		$(QUIET) \
 		-- \
 		$($(PKG)_SITE) \
@@ -212,7 +213,8 @@ define SOURCE_CHECK
 endef
 
 define DOWNLOAD_INNER
-	$(Q)if test -n "$(call qstrip,$(BR2_PRIMARY_SITE))" ; then \
+	$(Q)$(if $(filter bzr cvs git hg svn,$($(PKG)_SITE_METHOD)),export BR_NO_CHECK_HASH_FOR=$(2);) \
+	if test -n "$(call qstrip,$(BR2_PRIMARY_SITE))" ; then \
 		case "$(call geturischeme,$(BR2_PRIMARY_SITE))" in \
 			file) $(call $(3)_LOCALFILES,$(BR2_PRIMARY_SITE)/$(2),$(2)) && exit ;; \
 			scp) $(call $(3)_SCP,$(BR2_PRIMARY_SITE)/$(2),$(2)) && exit ;; \