Fixed Linux compile issues

src/api/Api.cpp

@@ -22,6 +22,8 @@
  */
 
 
+#include <cstring>
+
 #include "api/Api.h"
 #include "api/ApiState.h"
 

src/api/Httpd.cpp

@@ -21,7 +21,7 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-
+#include <cstring>
 #include <microhttpd.h>
 
 

src/api/NetworkState.cpp

@@ -23,6 +23,7 @@
 
 
 #include <algorithm>
+#include <cstring>
 #include <uv.h>