main/lk2nd: fix version display on lk2nd screen (MR 2585)

When building from tarball git tag is not available.
We need to pass version number manually.

This chnage is cosmetic, but will allow users to easily
identify version and source of their bootloader.

main/lk2nd/APKBUILD

 # Maintainer: Alexey Minnekhanov <alexeymin@postmarketos.org>
 pkgname=lk2nd
 pkgver=0.10.0
-pkgrel=0
+pkgrel=1
 pkgdesc="Secondary little kernel (lk) bootloader for several Qualcomm devices"
 arch="armv7 aarch64"
 url="https://github.com/msm8916-mainline/lk2nd"
@@ -38,9 +38,9 @@ build() {
 	unset PATH
 	export PATH=/usr/sbin:/usr/bin:/sbin:/bin
 
-	make TOOLCHAIN_PREFIX=arm-none-eabi- msm8916-secondary
-	make TOOLCHAIN_PREFIX=arm-none-eabi- msm8974-secondary
-	make TOOLCHAIN_PREFIX=arm-none-eabi- msm8226-secondary
+	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- msm8916-secondary
+	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- msm8974-secondary
+	make LK2ND_VERSION="$pkgver-r$pkgrel-postmarketos" TOOLCHAIN_PREFIX=arm-none-eabi- msm8226-secondary
 }
 
 package() {