Add libjs-jquery-tablesorter to package list.

Coverage html reports have a symlink to jquery.tablesorter.min.js
which is provided by libjs-jquery-tablesorter. If the package is
not installed coverage html reports will have a broken symlink to
that file.

Change-Id: I7496a22f36d4f2fda2f030962b10d5afbc8f448f
Merge "Add libjs-jquery-tablesorter to package list."