Remove unused included headers from testdb.c and testpkg.c

libgen.h was used for basename() in function main() from src/util/testdb.c
string.h was used for strlen() in function output_cb() from src/util/testpkg.c

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
Signed-off-by: Dan McGee <dan@archlinux.org>

src/util/testdb.c

@@ -24,7 +24,6 @@
 #include <limits.h>
 #include <string.h>
 #include <dirent.h>
-#include <libgen.h>
 
 #include <alpm.h>
 #include <alpm_list.h>

src/util/testpkg.c

@@ -21,7 +21,6 @@
 
 #include <stdio.h> /* printf */
 #include <stdarg.h> /* va_list */
-#include <string.h> /* strlen */
 
 #include <alpm.h>