build: add KERNEL_BITS=64 to macOS build on travis [skip appveyor]
build: add KERNEL_BITS=64 to macOS build on travis [skip appveyor]

JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl