Update include/ files for strict C function prototypes

include/wrapper/cef_library_loader.h

@@ -49,7 +49,7 @@ int cef_load_library(const char* path);
 // Unload the CEF library that was previously loaded. Returns true (1)
 // on success and false (0) on failure.
 ///
-int cef_unload_library();
+int cef_unload_library(void);
 
 #ifdef __cplusplus
 }