glib: disable FAM support since 2.70.2

[WhiredPlanck]

Topic Description

This pull request is to disable GLib's FAM (File system monitoring) support.

The original reason for this change is that the current FAM support in GLib breaks Firefox's WebExtensions threads with new new GLibC (version 2.34) and make various addons cannot work properly.

We discussed for this, and then found that Fedora has disabled GLib's FAM support since version 2.67, explaining as follows:

FAM support in GLib requires Gamin component, which has various issues
and is unmaintained for years. GLib is the only component that requires
it in RHEL. So let's do not build the optional glib2-fam subpackage on
RHEL so Gamin can be dropped out from there. I am not doing the same
change for Fedora as there are more components that require Gamin. So
the subpackage can be held there yet for some time. The only reason why
this change hasn't been done earlier is the fact that FAM support was
needed for DConf functionality when the home directory is on NFS. But
this shouldn't be a problem nowadays thanks to the following commit:
https://gitlab.gnome.org/GNOME/glib/-/commit/7427bb71.

So finally according to the result of Community's discussions, we decide to disable FAM support in GLib since 2.70.2 to make the world better.

In addition, this PR will make following adjustments to GLib:

• Disable debugging for its code is not suitable for a production
• Disable SELinux support for all (distribution policy)
• Enable sysprof (capture) support for Stable (package requirement)
• Build all default libraries (GIO modules) for Stable (distribution policy)

Package(s) Affected

glib

Security Update?

No

Test Build(s) Done

Primary Architectures

• AMD64 amd64
• AArch64 arm64

Secondary Architectures

Architectural progress for "secondary," or experimental ports does not impede on merging of this topic.

• Loongson 3 loongson3
• PowerPC 64-bit (Little Endian) ppc64el

Update(s) Uploaded to Stable

Primary Architectures

• AMD64 amd64
• AArch64 arm64

Secondary Architectures

Architectural progress for "secondary," or experimental ports does not impede on merging of this topic.

• Loongson 3 loongson3
• PowerPC 64-bit (Little Endian) ppc64el

[WhiredPlanck]

LGTM on AMD64