Fix -ltsan linking order
Fix -ltsan linking order

In some circumstances (e.g., on Travis) TSAN fails if -ltsan is linked
after -lpthread. This changes bazel.rc to link -ltsan before all other
libs.

Change-Id: I7d6f3b351d271f715b7f9c17c3acf905d0906e93

cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp