mariadb: Fix 64bit builds if pam is enabled

Fix the installation of the pam.so for 64bit builds.
This is an indirect backport of commit

8fa0a3ace6 ("mariadb: upgrade to 10.5.4")

from the master branch.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-dbs/mysql/mariadb.inc

@@ -167,8 +167,12 @@ do_install() {
         mv ${D}${datadir}/doc/README ${D}${datadir}/doc/${PN}/
     fi
     if ${@bb.utils.contains('DISTRO_FEATURES', 'pam', 'true', 'false', d)}; then
-        mv ${D}/lib/security ${D}/${libdir}
-        rmdir --ignore-fail-on-non-empty ${D}/lib
+        pam_so=$(find ${D} -name pam_user_map.so)
+        if [ x"${pam_so}" != x ]; then
+            pam_dir=$(dirname ${pam_so})
+            mv ${pam_dir} ${D}/${libdir}
+            rmdir --ignore-fail-on-non-empty ${pam_dir%security}
+        fi
     fi
 }