samsung-manta: replace openrc (MR 4823)

Closes #2600

device/community/device-samsung-manta/APKBUILD

@@ -4,7 +4,7 @@
 pkgname=device-samsung-manta
 pkgdesc="Google Nexus 10"
 pkgver=6
-pkgrel=0
+pkgrel=1
 url="https://postmarketos.org"
 license="MIT"
 arch="armv7"
@@ -25,6 +25,7 @@ source="
 	networkmanager.conf
 	hwclock
 "
+replaces="openrc" # for hwclock configuration
 
 build() {
 	devicepkg_build $startdir $pkgname