Fixed Linux build.

src/api/Api.cpp

@@ -21,6 +21,8 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <string.h>
+
 
 #include "api/Api.h"
 #include "api/ApiState.h"

src/api/Httpd.cpp

@@ -23,6 +23,7 @@
 
 
 #include <microhttpd.h>
+#include <string.h>
 
 
 #include "api/Api.h"

src/api/NetworkState.cpp

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