travis: allow failures for AArch64 builds
simde_em_int32x4_shiftLeftByScalar fails on Travis, but works with
newer version of qemu and GCC.
@@ -219,6 +219,11 @@ matrix:
# - cmake
# - cmake-data
+ allow_failures:
+ # This works with GCC 7.3.1 on qemu 2.11.1, but not on Travis. Not
+ # sure if the issue is with GCC or QEMU (or something else).
+ - env: C_COMPILER=aarch64-linux-gnu-gcc
+
before_install:
###
## If we use the matrix to set CC/CXX Travis overwrites the values,
