Fix handling of excludeJsInteropExport for SDM

Change-Id: I5abafb1764e80ea56871d546906d05b7fe614339
diff --git a/dev/core/src/com/google/gwt/util/regexfilter/RegexFilter.java b/dev/core/src/com/google/gwt/util/regexfilter/RegexFilter.java
index 72c9eaa..8c07a89 100644
--- a/dev/core/src/com/google/gwt/util/regexfilter/RegexFilter.java
+++ b/dev/core/src/com/google/gwt/util/regexfilter/RegexFilter.java
@@ -78,7 +78,7 @@
       include = (c == '+');
     }
     Pattern p = Pattern.compile(regex);
-    values.add(regex);
+    values.add((include ? '+' : '-') + regex);
     typePatterns.add(p);
     includeType.add(include);
   }