* libpei.h: New file, broken out of peicode.h.
* peigen.c: New file, broken out of peicode.h.
* peicode.h: A bunch of code moved out to libpei.h and peigen.c.
* configure.in: Add peigen.lo to list of files required for each
PE target.
* Makefile.am: Rebuild dependencies.
(BFD32_BACKENDS): Add peigen.lo.
(BFD32_BACKENDS_CFILES): Add peigen.c.
(SOURCE_HFILES): Add libpei.h.
* configure, Makefile.in: Rebuild.