Special copyright assignment for libgcc

[Hartmut Penner]

Most files compiled for libgcc.a have following special section in the
copyright statement:

  In addition to the permissions in the GNU General Public License, the
  Free Software Foundation gives you unlimited permission to link the
  compiled version of this file into combinations with other programs,
  and to distribute those combinations without any restriction coming
  from the use of this file.  (The General Public License restrictions
  do apply in other respects; for example, they cover modification of
  the file, and distribution when not linked into a combine
  executable.)

Is there any reason, why unwind-dw2.c, unwind-pe.h and unwind.inc don't
have that special section?
      regards, Hartmut Penner