Disable tests known to fail on AArch64:

  https://gitlab.dune-project.org/core/dune-common/-/issues/262
  https://issues.guix.gnu.org/62842

--- a/dune/common/test/eigenvaluestest.cc
+++ b/dune/common/test/eigenvaluestest.cc
@@ -340,20 +340,15 @@
   testSymmetricFieldMatrix<double,200>();
   testSymmetricFieldMatrix<float,4>();
   testSymmetricFieldMatrix<float,200>();
-  testSymmetricFieldMatrix<long double,4>();
-  testSymmetricFieldMatrix<long double,200>();
 #endif // HAVE_LAPACK
 
   testSymmetricFieldMatrix<double,2>();
   testSymmetricFieldMatrix<double,3>();
   testSymmetricFieldMatrix<float,2>();
   testSymmetricFieldMatrix<float,3>();
-  testSymmetricFieldMatrix<long double,2>();
-  testSymmetricFieldMatrix<long double,3>();
 
   checkMultiplicity<double>();
   checkMultiplicity<float>();
-  checkMultiplicity<long double>();
 
   return 0;
 }
switch'/></form></td></tr>
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<tr><td><span title='2020-12-11 21:37:07 +0100'>2020-12-11</span></td><td><a href='/guix/commit/gnu/installer/proxy.scm?id=8361817bf693742757b096468198626f297bb09e'>install: Discover local substitute servers.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/substitutes.scm: New file.
* gnu/installer/newt/substitutes.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add them.
* po/guix/POTFILES.in: Add gnu/installer/newt/substitutes.scm.
* gnu/installer/proxy.scm (with-silent-shepherd): Move to ...
* gnu/installer/utils.scm: ... here.
* gnu/installer/record.scm (&lt;installer&gt;)[substitutes-page]: New field.
* gnu/installer/newt.scm (substitutes-page): New procedure,
(newt-installer): register it.
* gnu/installer.scm (installer-steps): Add "substitutes-page" step.
* gnu/system/install.scm (%installation-services): Add avahi-service-type and
enable substitute server discover in guix-service-type.
[&lt;name-service-switch&gt;]: Set it to %mdns-host-lookup-nss.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-04-08 10:24:02 +0200'>2020-04-08</span></td><td><a href='/guix/commit/gnu/installer/proxy.scm?id=ee0ad7803c82383ac1bced073d8670bc407797e7'>installer: Add proxy support.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/proxy.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add it.
* po/guix/POTFILES.in: Add it.
* gnu/installer/newt/parameters.scm (run-proxy-page): New procedure,
(run-parameters-page): add the previous procedure to the parameters menu.
</span></span></td><td>Mathieu Othacehe</td></tr>