gprofng: fix a problem with hardware event counters

gprofng: fix a problem with hardware event counters

Fix a bug where an experiment with hardware event counter data
causes the source and disassembly files not to be generated.
No longer suppress zero valued metrics and change the name
of the man page in a warning message. Adapt line lengths to
not exceed 79.

gprofng/ChangeLog
2024-09-24  Ruud van der Pas  <ruud.vanderpas@oracle.com>

	PR 32193
	PR 32199
	PR 32201
	* gp-display-html/gp-display-html.in: Implement all
	the above changes.