Add more missing config.h #includes

Now that we use AC_SYS_LARGEFILE, we need to pull in config.h at least
whereever we use mmap().  Fixes at least the test-suite and simple-shm
on 32 bit systems.

wcap/main.c

@@ -20,6 +20,8 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <config.h>
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>

wcap/wcap-decode.c

@@ -20,6 +20,8 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <config.h>
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>