device-odroid-u2: load the ledtrig-heartbeat module

So that the blue led can automatically blink in the default heartbeat
mode.

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8630>

device/testing/device-odroid-u2/APKBUILD

@@ -2,7 +2,7 @@
 maintainer="Henrik Grimler <henrik@grimler.se>"
 pkgname=device-odroid-u2
 pkgdesc="ODROID U2/U3"
-pkgver=8
+pkgver=9
 pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
@@ -18,7 +18,13 @@ subpackages="
 	$pkgname-kernel-lts:kernel_lts
 	$pkgname-kernel-exynos4:kernel_exynos4
 "
-source="deviceinfo kernel-cmdline.conf modules-initfs.exynos4 modules-initfs.lts"
+source="
+	deviceinfo
+	kernel-cmdline.conf
+	led-heartbeat.conf
+	modules-initfs.exynos4
+	modules-initfs.lts
+"
 
 build() {
 	devicepkg_build $startdir $pkgname
@@ -26,6 +32,8 @@ build() {
 
 package() {
 	devicepkg_package $startdir $pkgname
+
+	install -Dm644 led-heartbeat.conf -t "$pkgdir"/usr/lib/modules-load.d
 }
 
 kernel_lts() {
@@ -43,6 +51,7 @@ kernel_exynos4() {
 sha512sums="
 460f9979c3db34322dc419f30c9f51dc44dff0804bbaa46b2762069eacd5c3a45339487b8b74d4b3655db5d889e1f942808d8f69cee8689c804804870b02e5a9  deviceinfo
 27420701ba9335b0a575300aa8591bb23f4c9d4c9479a16053ae5dad0a22a86d30ad51b6bb187dccc28753d652a2f8bb34d33ad13bc7c41dbcc60b2e1af05143  kernel-cmdline.conf
+91ea48bb6f82b8083042643f199789355ad2e8b673100ea73e656a95d10405300f6edd59e9786791c0684f842a40aedc922afdc64b6b571b5d52143fcd95addf  led-heartbeat.conf
 bc0c4f7eb77cc3393ac83114fe982b7d2d74725a7a390074ce29bb67b235895487018a407b8ce3593c1fa7e9dbd526199515f7932938c6169a440549eb73dfd3  modules-initfs.exynos4
 ba1229a573d863e783a0f945eb825fb77cfd10662d2eacf74c2e20d1e4d118a4fa68200305cd10e1606b489fc8c86e4da7f3305ac6973d3787420eec2bed91b2  modules-initfs.lts
 "

device/testing/device-odroid-u2/led-heartbeat.conf

@@ -0,0 +1 @@
+ledtrig-heartbeat