dev-db/mariadb: drop perror.1 sed workaround

dev-db/mariadb: drop perror.1 sed workaround

sed call no longer works after upstream changes [Link 1].

We are now patching CMakeLists.txt directly as part of our

  cmake: build without client libs and tools

patch.

Link 1: https://github.com/MariaDB/server/commit/5271d43648957141b55159958b66fd635d80ac85
Link 2: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a2fd815cdb09de08a302b80746fd40c65d30d69e

Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>