[PATCH] .travis.yml: Temporarily disable the aarch64 job

[Philippe Mathieu-Daudé]

Travis-CI Aarch64 runners are currently broken, the build fails
because the filesystem quota is full [1]:

    AR      libqemuutil.a
  nm: qemu-sockets.o: Bad value
    LINK    qemu-ga
  qga/main.o: In function `main':
  /home/travis/build/qemu/qemu/qga/main.c:1494: undefined reference to 
`socket_local_address'
  qga/channel-posix.o: In function `ga_channel_open':
  /home/travis/build/qemu/qemu/qga/channel-posix.c:210: undefined reference to 
`socket_parse'
  /home/travis/build/qemu/qemu/qga/channel-posix.c:193: undefined reference to 
`unix_listen'
  /home/travis/build/qemu/qemu/qga/channel-posix.c:218: undefined reference to 
`socket_listen'
  collect2: error: ld returned 1 exit status
  Makefile:686: recipe for target 'qemu-ga' failed
  make: *** [qemu-ga] Error 1

Per [2], LXD container have 'approx 18GB' of storage, but our runner show:

  $ df -h
  Filesystem                                                                    
                     Size  Used Avail Use% Mounted on
  
/var/snap/lxd/common/lxd/storage-pools/instances/containers/travis-job-qemu-qemu-693775643/rootfs
  895G   38G  854G   5% /

As we suppose a filesystem quota makes our build fail,
disable the aarch64 job as a temporary kludge.

[1] https://travis-ci.org/github/qemu/qemu/jobs/693775643
[2] 
https://docs.travis-ci.com/user/reference/overview/#virtualisation-environment-vs-operating-system

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 564be50a3c..3569ee99b3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -399,6 +399,7 @@ jobs:
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
     - name: "[aarch64] GCC check-tcg"
+      if: false # Temporarily disabled due to problem in aarch64 runner.
       arch: arm64
       dist: xenial
       addons:
-- 
2.21.3