build: add the + token to any commands that can pass through the jobserver, fixes parallel build on some systems

SVN-Revision: 33523

include/host-build.mk

@@ -80,7 +80,7 @@ ifneq ($(HOST_OS),Darwin)
 endif
 
 define Host/Configure/Default
-	(cd $(HOST_BUILD_DIR)/$(3); \
+	$(if $(HOST_CONFIGURE_PARALLEL),+)(cd $(HOST_BUILD_DIR)/$(3); \
 		if [ -x configure ]; then \
 			$(CP) $(SCRIPT_DIR)/config.{guess,sub} $(HOST_BUILD_DIR)/$(3)/ && \
 			$(2) \
@@ -97,7 +97,7 @@ define Host/Configure
 endef
 
 define Host/Compile/Default
-	$(MAKE) $(HOST_JOBS) -C $(HOST_BUILD_DIR) \
+	+$(MAKE) $(HOST_JOBS) -C $(HOST_BUILD_DIR) \
 		$(HOST_MAKE_FLAGS) \
 		$(1)
 endef