added support for gcc 5.2 and 5.3, and for clang tools

Fixes LBCORE-1051

LbUtils/scripts/cern-lxdistcc-wrappers.sh

@@ -94,7 +94,9 @@ case ${_self} in
setup_clang $_version
_self=${_self%-*}
_self=${_self#*-}
-                _self="${_self} --gcc-toolchain=${GCC_TOOLCHAIN}"
+                if [ "${_self}" = "clang" -o "${_self}" = "clang++" ] ; then
+                  _self="${_self} --gcc-toolchain=${GCC_TOOLCHAIN}"
+                fi
;;
*)