cmd/link: improve gap detection in TestPIESize

In CL 210180 we detect gaps between PT_LOAD segments and subtract
them from size calculation. The code there only works when
PT_LOAD segments are next to each other. But it is possible that
there are other segments in between (e.g. a GNU_RELRO segment).
Relax the gap detection to count gaps between PT_LOAD segments
regardless of whether they are next to each other.

Updates #36023.
Updates #35545.

Change-Id: I8b94506359fa649a4478acc742d86d4b16022dbc
Reviewed-on: https://go-review.googlesource.com/c/go/+/220654
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

0 files changed, 0 insertions, 0 deletions