rules.mk: add newline definition

To be used for stuff like $(subst $(space),$(newline),$(SOME_VAR))

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

SVN-Revision: 44796

rules.mk

@@ -28,6 +28,11 @@ strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
 
 define sep
 
+endef
+
+define newline
+
+
 endef
 
 _SINGLE=export MAKEFLAGS=$(space);