Add new utility for testing iphb timers

Verify that wakeup patterns are as expected when
- multiple overlapping mintime-maxtime ranges are used
- various sizes of global slot wakeups are used
- global slot wakeup is followed by cpu keepalive period

[tests] Added hbtest3 test tool
Apply a less strict version check for the spec file

Consider "1.0.0+devel.34.4.gc92e26c" = "1.0.0" to ease making test
builds in the OBS.

[verify_version] Apply a less strict version check for the spec file
Merge pull request #3 from spiiroin/hbtest3

Add new utility for testing iphb timers