bind: support Bool types.

Also add missing int8/int16 handling in bind/seq.

Fixes golang/go#10855.

Change-Id: I326ada44df10fc3c22628bdd2ae4ee2c3dc7902e
Reviewed-on: https://go-review.googlesource.com/10046
Reviewed-by: Alan Donovan <adonovan@google.com>

bind/java/SeqTest.java

@@ -22,6 +22,11 @@ public class SeqTest extends AndroidTestCase {
     assertEquals("Unexpected arithmetic failure", 7, res);
   }
 
+  public void testBool() {
+    assertTrue(Testpkg.Negate(false));
+    assertFalse(Testpkg.Negate(true));
+  }
+
   public void testShortString() {
     String want = "a short string";
     String got = Testpkg.StrDup(want);