update makefile with all headers as dependencies

src/serverWorker.c

@@ -1,9 +1,11 @@
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
 #include <ctype.h>
 #include <assert.h>
 #include <sys/select.h>
+#include <pthread.h>
 
 #include <conn.h>
 #include <message.h>

src/serverWorker.h

@@ -2,6 +2,8 @@
 #ifndef SERVERWORKER
 #define SERVERWORKER
 
+#include <pthread.h>
+
 #include <apiFile.h>
 #include <fileQueue.h>
 #include <taglialegna.h>