Merge pull request #343 from Kurausukun/patch-2

Fix compilation on gcc 10

tools/preproc/asm_file.cpp

@@ -20,6 +20,7 @@
 
 #include <cstdio>
 #include <cstdarg>
+#include <stdexcept>
 #include "preproc.h"
 #include "asm_file.h"
 #include "char_util.h"

tools/preproc/c_file.cpp

@@ -20,6 +20,7 @@
 
 #include <cstdio>
 #include <cstdarg>
+#include <stdexcept>
 #include <string>
 #include <memory>
 #include "preproc.h"