profile: Use _IO* but disable deprecation warning.

This fixes a regression introduced in
2f60084f77815f454d1521396c2a383390ea2865, whereby the profile derivation
would fail to run on Guile 2.0 (as is the case with "guix package
--bootstrap").

Reported by Christopher Baines.

* guix/profiles.scm (profile-derivation)[builder]: Use _IO* but add
'debug-disable' call.

install: Add colors in 'motd' and 'issue'.

* gnu/system/install.scm (%installation-services)[motd]: Add colors.
[services]: Use the "lat9u-16" font.
(%issue): Add colors.

profiles: Avoid _IO* in profile builder.

* guix/profiles.scm (profile-derivation)[builder]: Avoid the deprecated
_IO* constants.

doc: Link to work on bootstrapping.

* doc/guix.texi (Reducing the Set of Bootstrap Binaries): New section.

install: Add the prerequisites of 'profile-derivation' as GC roots.

* gnu/system/install.scm (%installation-services): Add
GLIBC-UTF8-LOCALES, TEXINFO, and GUILE-FINAL as GC roots.

profiles: Do not import the host's srfi-{19,26}.scm files.

Previously the "manual-database" derivation would always import the
host's srfi-{19,26}.scm files in the build side.  In practice this means
that different users could get different manual-database.drv depending
on the Guile version they're using in the host.

For example, the (gnu tests install) tests would fail if the host was
running Guile 2.2.3 because the guest is running 2.2.2, and thus has
different srfi-{19,26}.scm files.  The manual-database.drv would need to
be built from source, which would fail because prerequisites were
missing.

Reported by Mathieu Othacehe <m.othacehe@gmail.com>
at <https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29409#96>.

* guix/profiles.scm (manual-database): Do not pass #:modules to
'gexp->derivation'.  Wrap 'build' gexp in 'with-imported-modules' form.

gnu: Add kallisto.

* gnu/packages/bioinformatics.scm (kallisto): New variable.

gnu: calf: Update to 0.90.0.

* gnu/packages/audio.scm (calf): Update to 0.90.0.

gnu: jack-2: Update to 1.9.11-RC1.

* gnu/packages/audio.scm (jack-2): Update to 1.9.11-RC1.

gnu: guitarix: Update to 0.36.1.

* gnu/packages/audio.scm (guitarix): Update to 0.36.1.

gnu: faust-2: Remove inherited phase.

* gnu/packages/audio.scm (faust-2)[arguments]: Remove build phase
"fix-permissions".

gnu: faust: Update to 0.9.90.

* gnu/packages/audio.scm (faust): Update to 0.9.90.
[source]: Download sources via git-fetch.
[arguments]: Add phase "fix-permissions".

gnu: Add gst123.

* gnu/packages/gstreamer.scm (gst123): New variable.

gnu: weechat: Update to 2.0.

* gnu/packages/irc.scm (weechat): Update to 2.0.

gnu: libwebp: Update to 0.6.1.

* gnu/packages/image.scm (libwebp): Update to 0.6.1.

gnu: git: Update to 2.15.1.

* gnu/packages/version-control.scm (git): Update to 2.15.1.

gnu: wireshark: Update to 2.4.3.

* gnu/packages/networking.scm (wireshark): Update to 2.4.3.

gnu: giac-xcas: Update to 1.4.9-33.

* gnu/packages/algebra.scm (giac-xcas): Update to 1.4.9-33.

gnu: guile-dsv: Update to 0.2.1 & correct sha256.

* gnu/packages/guile.scm (guile-dsv): Update to 0.2.1.

gnu: mescc-tools: Update to 0.3.

* gnu/packages/mes.scm (mescc-tools): Update to 0.3.
[supported-systems]: Remove field.