git-extra: fix syntax error in /etc/profile.d/git-sdk.sh

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: KSR-Yasuda

git-extra/git-sdk.sh

@@ -360,7 +360,7 @@ sdk () {
 				  git diff-index --quiet HEAD ||
 				  test ! -s .git/index ||
 				  (uname_m="$(uname -m)" &&
-				    test ! -d "../build-$uname_m-pc-msys/$uname_m-pc-cygwin/winsup/cygwin") &&
+				    test ! -d "../build-$uname_m-pc-msys/$uname_m-pc-cygwin/winsup/cygwin" &&
 				    test ! -d "../build-$uname_m-pc-msys/$uname_m-pc-msys/winsup/cygwin"); }
 			then
 				# no local changes