package/mtd-utils: fix git build after gitweb update

Reported by Daniel Mack <daniel@caiaq.de>

The gitweb installation of infradead.org has been updated, and gitweb >=
1.6.6-rc1 adds the first 7 characters of the git SHA1 to the snapshot
tarball directory name.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

CHANGES

@@ -4,7 +4,7 @@
 
 	Updated/fixed packages: autoconf, bind, binutils, busybox,
 	directfb, gst-plugins-bad, iw, libfuse, libpcap, lighttpd,
-	mesa, pcre, sshfs, tremor, usbutils
+	mesa, mtd-utils, pcre, sshfs, tremor, usbutils
 
 	Issues resolved (http://bugs.uclibc.org):
 

package/mtd/mtd-utils.git/mtd.mk

@@ -4,12 +4,14 @@
 #
 #############################################################
 MTD_VERSION:=fcb52ccc99679460640386c297023f852b108f68
+# gitweb >= 1.6.6-rc1 uses first 7 chars of git SHA1 as dir suffix
+MTD_SHORT_VERSION=$(shell echo $(MTD_VERSION)|cut -c -7)
 MTD_SOURCE:=mtd-utils-$(MTD_VERSION).tar.gz
 MTD_URL:=http://git.infradead.org/mtd-utils.git?a=snapshot;h=$(MTD_VERSION);sf=tgz
 MTD_HOST_DIR:= $(TOOLCHAIN_DIR)/mtd-utils-$(MTD_VERSION)
 MTD_DIR:=$(BUILD_DIR)/mtd-utils-$(MTD_VERSION)
 MTD_CAT:=$(ZCAT)
-MTD_NAME:=mtd-utils
+MTD_NAME:=mtd-utils-$(MTD_SHORT_VERSION)
 
 #############################################################
 #