travis-ci: only test llvm3.4 branch
travis-ci: only test llvm3.4 branch

chetant/LibClang,deech/LibClang,deech/LibClang,ony/LibClang,chetant/LibClang,ony/LibClang,deech/LibClang,chetant/LibClang,ony/LibClang,chetant/LibClang,deech/LibClang