main/linux-pam: move to /usr/lib

This is not a requirement for booting the system, as one can log in
without it. So move the pam modules to /usr/lib

main/linux-pam/APKBUILD

@@ -3,7 +3,7 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=linux-pam
 pkgver=1.6.1
-pkgrel=0
+pkgrel=1
 pkgdesc="Linux PAM (Pluggable Authentication Modules for Linux)"
 url="https://www.kernel.org/pub/linux/libs/pam"
 arch="all"
@@ -48,7 +48,7 @@ build() {
 		--build=$CBUILD \
 		--host=$CHOST \
 		--prefix=/usr \
-		--libdir=/lib \
+		--libdir=/usr/lib \
 		--sysconfdir=/etc \
 		--mandir=/usr/share/man \
 		--infodir=/usr/share/info \
@@ -77,10 +77,6 @@ package() {
 	chgrp shadow "$pkgdir"/sbin/unix_chkpwd \
 		&& chmod g+s "$pkgdir"/sbin/unix_chkpwd
 
-	# wrong dir due to libdir
-	mkdir -p "$pkgdir"/usr/lib
-	mv "$pkgdir"/lib/pkgconfig "$pkgdir"/usr/lib/pkgconfig
-
 	# we don't ship systemd
 	rm -r "$pkgdir"/usr/lib/systemd
 }