Add dlfcn_test to glibc test suite.

Bug: 18186310

(cherry picked from commit eb27bbae8f)

Change-Id: I1d608dfa12dbafbdcdb8bc6d818c5872404c19e0

tests/libs/dlopen_testlib_simple.cpp

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <stdint.h>
 #include <stdlib.h>
 
 uint32_t dlopen_testlib_taxicab_number = 1729;