Exclude 'testsrc' and 'examples' from spotbugs on Windows systems (#1086)

spotbugs-exclude.xml

@@ -5,9 +5,15 @@
   <Match>
     <Source name="~.*\/testsrc\/.*"/>
   </Match>
+  <Match>
+    <Source name="~.*\\testsrc\\.*"/>
+  </Match>
   <Match>
     <Source name="~.*\/examples\/.*"/>
   </Match>
+  <Match>
+    <Source name="~.*\\examples\\.*"/>
+  </Match>
   <Match>
     <Class name="~org\.mozilla\.javascript\.benchmarks\.jmh_generated.*"/>
   </Match>