Use configure settings for git-subtree

Include config.make.autogen in the git-subtree contrib area to pick up settings for prefix and other such things. Signed-off-by: David A. Greene <greened@obbligato.org>

David A. Greene committed Apr 9, 2012 at 21:39 UTC 187bc2da5bc2172a7cc8a0da3b4c0994e7a0d9fc
1 file changed +3
contrib/subtree/Makefile
+3
@@ -1,3 +1,6 @@
1 +-include ../../config.mak.autogen
2 +-include ../../config.mak
3 +
4 prefix ?= /usr/local
5 mandir ?= $(prefix)/share/man
6 gitdir ?= $(shell git --exec-path)