Revert "Revert "Suppress Octave failing the build""

This reverts commit 492b1b0339.

Reverting a series of Octave commits for re-applying again without
incorrect whitespace changes.

.travis.yml

@@ -47,7 +47,9 @@ matrix:
     - compiler: gcc
       env: SWIGLANG=tcl
   allow_failures:
-    # None
+    # g++-4.6.3 internal compiler error for li_std_vector testcase
+    - compiler: gcc
+      env: SWIGLANG=octave SWIGJOBS=-j4
 before_install:
   - date -u
   - uname -a