merge x11perf 1.7.0, xfs 1.2.2, xrandr 1.5.3, and xtrans 1.5.2.

merge x11perf 1.6.2.

apply const a little more.

initial import of x11perf-1.6.0

initial import of x11perf-1.5.3:
- fix overflow bugs
- fixes Xft bugs
- add -falseprecision flag

initial import of x11perf-1.5.1

initial import of x11perf-1.4.1