cmt_gcc_version.sh requires a modification for newer gcc versions

[harald.vogt@…]

CMT/v1r20p20070720/mgr: the script cmt_gcc_version.sh gives no results for newer gcc compiler versions. Since gcc 3.3 the reply of "gcc -v" has moved from eg. "gcc version 3.2.3" to "gcc-Version 3.3.3" .Therefore one has to check if "gcc -v 2>&1 | grep version | cut -d ' ' -f3 | sed -e 's#^{[0-9]#gcc-&#'" gives no reply and if so try "gcc -v 2>&1 | grep Version | cut -d ' ' -f2 | sed -e 's#}[0-9]#gcc-&#'" to avoid warinings like: "#CMT> Warning: apply_tag with empty name [$(cmt_compiler_version)]"