gnu: acpica: Update to 20200430.

* gnu/packages/admin.scm (acpica): Update to 20200430.

gnu: kdeconnect: Fix kdeconnectd path.

* gnu/packages/kde.scm (kdeconnect)[arguments]: Add configure-flag to
set libexec as a top-level directory in the output.

gnu: racket: Update to 7.7.

* gnu/packages/scheme.scm (racket): Update to 7.7.

gnu: qemu-minimal: Use 'match' to find architecture.

* gnu/packages/virtualization.scm (qemu-minimal)[arguments]: Use 'match'
to target the correct architecture.

doc: meson-build-system: Fix build type documentation.

* doc/guix.texi (Build Systems): Fix meson build system description.

gnu: soundconverter: Update to 3.0.2.

* gnu/packages/gnome.scm (soundconverter): Update to 3.0.2.
[source]: Remove upstreamed patch.
* gnu/packages/patches/soundconverter-remove-gconf-dependency.patch:
Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: alpine: Support cross-gcc'ing.

* gnu/packages/mail.scm (alpine)[arguments]: Use ${target}-gcc when
cross-compiling.

gnu: alpine: Update to 2.22.

* gnu/packages/mail.scm (alpine): Update to 2.22.
[arguments]: Add ‘assume-shadow-passwords’ phase.

gnu: spiped: Update to 1.6.1.

* gnu/packages/networking.scm (spiped): Update to 1.6.1.

gnu: java-xz: Remove duplicate definition.

* gnu/packages/java.scm (java-xz): Remove duplicate variable.
(java-plexus-archiver)[inputs]: Use java-xz.
* gnu/packages/java-compression.scm (java-tukaani-xz): Rename to
java-xz.

gnu: julius: Remove unused bundled libraries.

* gnu/packages/games.scm (julius)[source](snippet): Remove
ext/{dirent,png,SDL2,zlib}.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu: julius: Update to 1.4.0.

* gnu/packages/games.scm (julius): Update to 1.4.0.
[inputs]: Add new dependency libpng.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu: mumble: End phase with #t.

* gnu/packages/telephony.scm (mumble)[arguments] End install phase with #t.

gnu: java-jmapviewer: Return #t from all phases.

* gnu/packages/geo.scm (java-jmapviewer)[arguments]: Return #t from install
phase.

gnu: supertux: Update to 0.6.2.

* gnu/packages/games.scm (supertux): Update to 0.6.2.

gnu: padthv1: Update to 0.9.14.

* gnu/packages/music.scm (padthv1): Update to 0.9.14.

gnu: samplv1: Update to 0.9.14.

* gnu/packages/music.scm (samplv1): Update to 0.9.14.

gnu: drumkv1: Update to 0.9.14.

* gnu/packages/music.scm (drumkv1): Update to 0.9.14.

gnu: synthv1: Update to 0.9.14.

* gnu/packages/music.scm (synthv1): Update to 0.9.14.

gnu: guile-hall: Update to 0.3.1.

* gnu/packages/guile-xyz.scm (guile-hall): Update to 0.3.1.