gnu: libsoup: Disable the hsts test.

The test was found to fail on i686-linux.

* gnu/packages/gnome.scm (libsoup-minimal)[phases]
{adjust-tests}: De-register the hsts test.

gnu: slang: Really fix the array tests on 32 bit architectures.

This is a follow up to efb0a04ee05f43e86b3c1fcda867a123d8ed021a.

* gnu/packages/slang.scm (slang)[phases]{reduce-array-test-size}: Further
reduce the array size.

gnu: adwaita-icon-theme: Fix the conditional native input.

This is a follow up to commit 16afb35ac9.

* gnu/packages/gnome.scm (adwaita-icon-theme)[native-inputs]: Add an extra
layer of parenthesizes on the conditional input to be spliced.

gnu: webkitgtk: Really disable SSE2 on non-x86_64 achitectures.

This is a followup to d82fd7c2dd542693988f61fb15c020e3209ac7ec.

* gnu/packages/webkit.scm (webkitgtk)[phases]{disable-sse2}: Adjust.

Co-authored-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

gnu: libsoup: Update to 3.0.3.

This resolves test failures on 32 bit platforms (see:
https://gitlab.gnome.org/GNOME/libsoup/-/issues/236).

* gnu/packages/gnome.scm (libsoup): Update to 3.0.3.

gnu: adwaita-icon-theme: Fix build on non-x86_64 targets.

* gnu/packages/gnome.scm (adwaita-icon-theme)[native-inputs]: Do not provide
use 'gtk-encode-symbolic-svg' unless building for x86_64.

profiles: Also handle package objects in GDK-PIXBUF-LOADERS-CACHE-FILE.

* guix/profiles.scm (gdk-pixbuf-loaders-cache-file): Handle both a string or a
package object for GDK-PIXBUF, as these are the two types that can be returned
by MANIFEST-LOOKUP-PACKAGE.

Suggested-by: Ludovic Courtès <ludo@gnu.org>

gnu: Use 'search-input-directory' for the SDL header directory.

This is a followup to bf182596a9d85604f6f029302671a38001575355.

* gnu/packages/games.scm (prboom-plus, red-eclipse, btanks)
(edgar): Use 'search-input-directory' instead of 'search-input-file'
when looking for "include/SDL".
(abbaye): Likewise, and search "include/SDL2" instead of "include/SDL".

gnu: gtk+: Skip test that requires SVG support on non-x86_64.

* gnu/packages/gtk.scm (gtk+)[arguments]: In 'disable-failing-tests',
skip 'tree-relationships' when not 'target-x86-64?'.

gnu: slang: Fix build on 32 bit systems.

* gnu/packages/slang.scm (slang)[phases]{reduce-array-test-size}: New phase.

gnu: efl: Only conditionally enable the optional SVG support.

* gnu/packages/enlightenment.scm (efl)[inputs]
{librsvg}: Only provide it when the target is x86_64.
[configure-flags]: Remove dead code.  Conditionally disable the 'rsvg' loader
via the 'evas-loaders-disabler' flag.

profiles: Fix the gdk-pixbuf-loaders-cache-file hook.

'guix install' would otherwise fail with a wrong type argument whet attempting
to call the hook.

* guix/profiles.scm (gdk-pixbuf-loaders-cache-file) <file-append>: Replace
with...
<string-append>: ... this, as gdk-pixbuf has already been expanded to a string
at this point.

gnu: gtk+: Conditionally disable the tree-relationships test.

* gnu/packages/gtk.scm (gtk+)[phases] {disable-failing-tests}: Disable the
tree-relationships test on non-x86_64 targets.

gnu: uim-gtk: Build with '-O2'.

* gnu/packages/xorg.scm (uim-gtk)[arguments]: Pass "-O2 -g".

gnu: w-scan: Build with '-O2'.

* gnu/packages/video.scm (w-scan)[arguments]: Pass "-O2 -g".

gnu: transcode: Build with '-O2'.

* gnu/packages/video.scm (transcode)[arguments]: Pass "-O2 -g".

gnu: aris: Build with '-O2'.

* gnu/packages/maths.scm (aris)[arguments]: Pass "-O2 -g".

gnu: geeqie: Build with '-O2'.

* gnu/packages/image-viewers.scm (geeqie)[arguments]: Pass "-O2 -g".

gnu: gpredict: Build with '-O2'.

* gnu/packages/astronomy.scm (gpredict)[arguments]: Pass "-O2 -g".

gnu: vinagre: Build with '-O2'.

* gnu/packages/gnome.scm (vinagre)[arguments]: Pass "-O2 -g".