travis: allow_failures os: osx

Signed-off-by: Daniel Black <daniel.black@au.ibm.com>

.travis.yml

@@ -48,6 +48,20 @@ matrix:
         - export MTR_MEM=/tmp
         - env DEB_BUILD_OPTIONS="parallel=6" debian/autobake-deb.sh;
         - ccache --show-stats
+  # Until OSX becomes a bit more stable: MDEV-12435
+  allow_failures:
+    - os: osx
+      compiler: clang
+      env: GCC_VERSION=4.8 TYPE=RelWithDebInfo MYSQL_TEST_SUITES=rpl
+    - os: osx
+      compiler: clang
+      env: GCC_VERSION=5   TYPE=RelWithDebInfo MYSQL_TEST_SUITES=main,archive,optimizer_unfixed_bugs,parts,sys_vars,unit,vcol,innodb,innodb_gis,innodb_zip,innodb_fts
+    - os: osx
+      compiler: clang
+      env: GCC_VERSION=6   TYPE=RelWithDebInfo MYSQL_TEST_SUITES=binlog,binlog_encryption,encryption,rocksdb
+    - os: osx
+      compiler: clang
+      env: GCC_VERSION=6   TYPE=RelWithDebInfo MYSQL_TEST_SUITES=csv,federated,funcs_1,funcs_2,gcol,handler,heap,json,maria,percona,perfschema,plugins,multi_source,roles
 
 # Matrix include for coverity
 #    - env: