android: Support host multilib builds.

test/android/32or64.c

Index: test/android/32or64.c
diff --git a/test/android/hello.c b/test/android/32or64.c
similarity index 57%
copy from test/android/hello.c
copy to test/android/32or64.c
index e6bf622aaa411c1ac8b1f16be4a4c690421d5bd9..3ea81692bde47a65456b38b929e21fbb331eae8c 100644
--- a/test/android/hello.c
+++ b/test/android/32or64.c
@@ -3,10 +3,11 @@
  * found in the LICENSE file.
  */
 
-#include <stdio.h>
-
-int main()
+const char* getString()
 {
-  printf("Hello, world!\n");
-  return 0;
+#ifdef __LP64__
+  return "Hello, 64-bit world!\n";
+#else
+  return "Hello, 32-bit world!\n";
+#endif
 }