Log Message:
Fix grub-install problem reported in PR 22049 by Soren Jacobsen.
While here, convert to USE_NEW_TEXINFO, and make it compile.
[freestanding, but using nested functions; gcc emits __enable_exec_stack,
which lives in libgcc, but is not linked because the program is supposed
to be freestanding. Provide dummy __enable_exec_stack function.]
Bump PKGREVISION.