travis: temporarily allow failures until Travis fixes a bug
The icc and clang-9 builds seem to trigger a bug in Travis.  See
The commit works in other repos, but not this one.  Hopefully they
are able to fix the issue soon and we can hove these back out of the
allowed failures.
@@ -124,6 +124,9 @@ jobs:
allow_failures:
- name: xlc
- name: s390x
+ # https://travis-ci.community/t/odd-error-in-one-repo-works-in-another/6859/3
+ - name: clang-9
+ - name: icc
before_install:
- cat /proc/cpuinfo || true
