Disable ubsan on Travis.

We are just wasting builders on it timing out.

Change-Id: I5b017cbeac1a8a846836971b82d41dfad84c28aa
diff --git a/.travis.yml b/.travis.yml
index fcb7192..0603419 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -66,11 +66,13 @@
       sudo: false
       compiler: clang
       env: CFG=linux_trusty-clang-x86_64-msan GN_ARGS="is_debug=false is_msan=true"
-    - os: linux
-      dist: trusty
-      sudo: true
-      compiler: clang
-      env: CFG=linux_trusty-clang-x86_64-ubsan_asan_lsan GN_ARGS="is_debug=false is_ubsan=true is_asan=true is_lsan=true"
+# TODO(b/117093687): This always times out in Travis.
+# Re-enable once that is fixed.
+#    - os: linux
+#      dist: trusty
+#      sudo: true
+#      compiler: clang
+#      env: CFG=linux_trusty-clang-x86_64-ubsan_asan_lsan GN_ARGS="is_debug=false is_ubsan=true is_asan=true is_lsan=true"
     - os: linux
       dist: trusty
       sudo: false