use `svnversion -c`

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40066 15284696-431f-4ddb-bdfa-cd5b030d7da7

configure

@@ -1316,7 +1316,7 @@ else
 fi
 
 if test "$SVN_VERSION" != "no" ; then
-   GRASS_VERSION_SVN=`$SVN_VERSION`
+   GRASS_VERSION_SVN=`$SVN_VERSION -c`
 fi
 
 

configure.in

@@ -127,7 +127,7 @@ changequote([,])
 GRASS_VERSION_SVN=
 AC_PATH_PROG(SVN_VERSION, svnversion, no)
 if test "$SVN_VERSION" != "no" ; then
-   GRASS_VERSION_SVN=`$SVN_VERSION`
+   GRASS_VERSION_SVN=`$SVN_VERSION -c`
 fi
 
 AC_SUBST(GRASS_VERSION_FILE)