pseudo: Upgrade to version 1.9.1

pseudo: Upgrade to version 1.9.1

This brings in:
 * nftw, nftw64: add wrapper
 * ftw, nftw, ftw64, nftw64: add tests
 * Move ftw and ftw64 to calling ntfw and nftw64
 * makewrappers: Introduce 'array' support
 * pseudo_util.c: Avoid warning when we intentionally discard const
 * pseudo_client.c: Fix warning
 * yocto-older-glibc-symbols.path: Add as a reference patch
 * pseudo/pseudo_client: Add wrapper functions to operate correctly with glibc 2.38 onwards
 * configure: Prune PIE flags
 * test/test-parallel-rename.sh: Add parallel rename test
 * test/test-parallel-symlinks.sh: Add parallel symlink test
 * ports/linux/guts: Add .gitignore to ignore generated files

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 994e508b2a0ede8b5cc4fe39444cf25dc9a53faf)
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>