Don't fail the Travis build for ppc64le jobs, which are also unreliable.
e.g.
@@ -234,6 +234,8 @@ jobs:
env: CONFIG="--enable-mods-shared=reallyall"
- arch: arm64
env: CONFIG="--enable-mods-shared=reallyall"
+ - arch: ppc64le
+ env: CONFIG="--enable-mods-shared=reallyall"
# CPAN modules are to be used with the system Perl and always with
# CC=gcc, e.g. for the CC="gcc -m32" case the builds are not correct
