Rename module stdbool-h to bool.
Reported by Paul Eggert in
<https://lists.gnu.org/archive/html/bug-gnulib/2024-12/msg00193.html>.
* modules/bool: Renamed from modules/stdbool-h.
* modules/bool-tests: Renamed from modules/stdbool-h-tests.
* modules/bool-c++-tests: Renamed from modules/stdbool-h-c++-tests.
* tests/test-bool.c: Renamed from tests/test-stdbool-h.c.
* tests/test-bool-c++.cc: Renamed from tests/test-stdbool-h-c++.cc.
* tests/test-bool-c++2.cc: Renamed from tests/test-stdbool-h-c++2.cc.
* modules/stdbool-h-c99-tests: Update.
* modules/stdbool-h-c99-c++-tests: Update.
* tests/test-stdbool-h-c99.c: Update.
* tests/test-stdbool-h-c99-c++.cc: Update.
* doc/posix-headers/stdbool.texi: Update.
* doc/gnulib-readme.texi: Update.
* doc/gnulib.texi: Update.
* modules/* (Depends-on): Update.
* modules/stdbool: Update.