shapshot_posix: use --non-recursive rather than --depth=files until the linux distros catch up

[SVN r49432]

tools/release/snapshot_posix.sh

@@ -14,7 +14,8 @@ rm -r -f svn_info
 
 echo "Exporting files from subversion..."
 # leave an audit trail, which is used by inspect to determine revision number
-svn co --depth=files http://svn.boost.org/svn/boost/branches/release svn_info
+#   use --non-recursive rather than --depth=files until the linux distros catch up
+svn co --non-recursive http://svn.boost.org/svn/boost/branches/release svn_info
 svn export --non-interactive --native-eol LF http://svn.boost.org/svn/boost/branches/release posix
 
 echo "Building docs..."