Fix Linux build.

src/base/io/log/Log.cpp

@@ -30,6 +30,7 @@
 #endif
 
 
+#include <string.h>
 #include <string>
 #include <time.h>
 #include <uv.h>

src/base/io/log/backends/FileLog.cpp

@@ -24,6 +24,7 @@
  */
 
 
+#include <string.h>
 #include <uv.h>
 
 

src/base/io/log/backends/SysLog.cpp

@@ -49,5 +49,5 @@ void xmrig::SysLog::print(int level, const char *line, size_t offset, size_t, bo
         return;
     }
 
-    syslog(level == -1 ? LOG_INFO : level, line + offset);
+    syslog(level == -1 ? LOG_INFO : level, "%s", line + offset);
 }