allow rb IE test failure on Appveyor

Author: lmtierney

appveyor.yml

@@ -6,6 +6,10 @@ environment:
       TASK: build
     - RUBY_VERSION: 200-x64
       TASK: //rb:ie-test
+matrix:
+  allow_failures:
+    - RUBY_VERSION: 200-x64
+      TASK: //rb:ie-test
 install:
   - 'set JAVA_HOME=C:\Program Files (x86)\Java\jdk1.8.0'
   - 'set PATH=%JAVA_HOME%;%PATH%'