Introduce Packer::bele.

src/p_exe.cpp

@@ -50,6 +50,7 @@ static const
 PackExe::PackExe(InputFile *f) :
     super(f)
 {
+    bele = &N_BELE_RTP::le_policy;
     COMPILE_TIME_ASSERT(sizeof(exe_header_t) == 32);
     ih_exesize = ih_imagesize = ih_overlay = 0;
 }