rpm: update 4.18.0 -> 4.18.1

Summary of changes from RPM 4.18.0

General bugfixes and enhancements

Command line
Fix signature reserved space not restored on --delsign (#2382, regression in 4.15.0)
Copy original lead on signing instead of recreating (#1326, regression in 4.14.0)
Issue a warning when signing created an OpenPGP v3 signature (#2286)

Transactions
Fix install of block and character special files (#2195, #2275, regression in 4.18.0)
Handle downgrade within V-R when epoch goes away (RhBug:1845069)

Package building

Spec
Restore BuildRequires check in rpmbuild -bp (regression in 4.15.0)
Fix space handling in %setup (#2335, regression in 4.18.0)
Issue a deprecation warning on %patchN syntax

Macros
Don’t embed CPU count of build system in packages (#2343)
Make CPU and thread-related macros available on all platforms (#2265)
Fix macro scoping level on re-entry from %[] expression (#2354)
Split ___build_pre macro to make mocking rpm build environment easier

Buildroot policies
Fix xargs use in brp-remove-la-files on macOS (#2332, regression in 4.17.0)

Generators
Disable debuginfod server lookups in build and dependency generator scripts
Exclude kernel modules from ELF dependency generation (regression in 4.17.0)
Signatures and keys
Fix type confusion bugs in the internal OpenPGP implementation

Plugins
Make write() non-blocking in fapolicyd plugin (RhBug:2110787)
Add a handler for libselinux log messages (RhBug:2123719, RhBug:2050774)

API changes
N/A

Internal improvements and cleanups
Fix potential uninitialized variable use on public key import
Fix various leaks during package build and install
Fix getopt() usage to comply with POSIX

Build process
Generate Python egg-info from automake builds (#130, #2230)
Revise ISANAME for loongarch
Documentation
Document %_binary_payload and %_source_payload syntax in RPM package format manual
Various typo and grammar fixes in reference manuals
Minor CONTRIBUTING.md updates

Drop:
0001-docs-do-not-build-manpages-requires-pandoc.patch
(pandoc is now detected from $PATH)
fifofix.patch
(upstream fixed the issue)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit d8d673b2)
Signed-off-by: Steve Sakoman <steve@sakoman.com>