base::standard-packages: install `perf`

Install either the `linux-tools` (Ubuntu < 14.04) or `linux-tools-generic`
(14.04+) so we get `perf`, a tool for using the performance counters subsytem of
the Linux kernel to analyze performance.

Change-Id: I94b090bd99fc7d94d9f2abb19ae3e7e832236666
Add 437-05 to unified baselining

Also move 255-03 from disabled to enabled in comments

Change-Id: If13c33d2c86fde7ca431684984fc3212e01c4d81
Merge "base::standard-packages: install `perf`" into production