petitboot-motorola-smi: get udev rules from /usr/lib/udev (MR 5679)

All rules have been moved to /usr as the move to /usr-merge from
alpine

device/testing/petitboot-motorola-smi/APKBUILD

 pkgname=petitboot-motorola-smi
 pkgver=1.13
-pkgrel=0
+pkgrel=1
 _commit="c6e874098175b03deb6829c340fccad7bfb5a258"
 pkgdesc="Petitboot based bootloader for motorola-smi"
 url="https://github.com/open-power/petitboot"
@@ -52,7 +52,7 @@ build() {
 	cp --parents /etc/terminfo/v/vt102 initramfs
 	ln -s /bin/init initramfs/init
 	cp --parents -r /etc/udev/rules.d initramfs
-	cp --parents -r /lib/udev/rules.d initramfs
+	cp --parents -r /usr/lib/udev/rules.d initramfs
 	loadkeys -b keymap.map > initramfs/etc/keymap.bmap
 	cd initramfs; find . ! -name '*.*~' | cpio -o -H newc | gzip > $srcdir/initramfs.cpio.gz