- fix issue with configure when building srcdir != builddir

git-svn-id: svn://svn.berlios.de/openocd/trunk@1352 b42882b7-edfa-0310-969c-e2dbd0fdcd60

configure.in

@@ -35,7 +35,7 @@ AC_ARG_ENABLE(release,
 
 if test $build_release = no; then
 	# check we can find guess-rev.sh
-	AC_CHECK_FILE("guess-rev.sh", build_release=no, build_release=yes)
+	AC_CHECK_FILE("$srcdir/guess-rev.sh", build_release=no, build_release=yes)
 fi
 
 # We are not *ALWAYS* being installed in the standard place.