Revert "remove clang testing for travis (strange core dumps)"
Revert "remove clang testing for travis (strange core dumps)"

This reverts commit 2aff0ff1d92cd58584e3b0220442c7ffdb9fc639.

wantee/connLM,wantee/connLM,wantee/connLM,wantee/connLM,wantee/connLM,wantee/connLM