mtd-utils: don't use trailing slash in S

(From OE-Core rev: c77651549dd382007c60767076a1a1c72e282bca)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/mtd/mtd-utils_git.bb

@@ -17,7 +17,7 @@ SRC_URI = "git://git.infradead.org/mtd-utils.git \
            file://add-exclusion-to-mkfs-jffs2-git-2.patch \
            "
 
-S = "${WORKDIR}/git/"
+S = "${WORKDIR}/git"
 
 EXTRA_OECONF += "--enable-install-tests"