Clang-format: trivial fix on some headers (#5495)

Fix some headers style and remove them from whitelist

src/gettime.h

@@ -45,8 +45,8 @@ extern u32 getTime(TimePrecision prec);
 	Timestamp stuff
 */
 
-#include <time.h>
 #include <string>
+#include <time.h>
 
 inline std::string getTimestamp()
 {
@@ -54,10 +54,9 @@ inline std::string getTimestamp()
 	// This is not really thread-safe but it won't break anything
 	// except its own output, so just go with it.
 	struct tm *tm = localtime(&t);
-	char cs[20]; //YYYY-MM-DD HH:MM:SS + '\0'
+	char cs[20]; // YYYY-MM-DD HH:MM:SS + '\0'
 	strftime(cs, 20, "%Y-%m-%d %H:%M:%S", tm);
 	return cs;
 }
 
-
 #endif