Fix tests on Arch Linux (#2163)

* fix search_memory test

* fix for tests

tests/gdb-tests/tests/binaries/reference-binary-net.c

@@ -1,5 +1,6 @@
 #include <arpa/inet.h>
 #include <stdio.h>
+#include <unistd.h>
 
 #define PORT 31337
 

tests/gdb-tests/tests/binaries/search_memory.c

@@ -4,6 +4,7 @@
  */
 
 #include <stdlib.h>
+#include <string.h>
 
 void break_here(void) {}