Fix encryption support build in Omni 6.0 tree

trampoline/encryption.c

@@ -16,6 +16,7 @@
  */
 
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <ctype.h>
 #include <stdio.h>

trampoline_encmnt/encmnt.c

@@ -15,6 +15,7 @@
  * along with MultiROM.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>

trampoline_encmnt/pw_ui.c

@@ -15,6 +15,7 @@
  * along with MultiROM.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdlib.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <stdio.h>