Build uboot_env.img statically
The environment partition can control the behavior of the bootloader.
Therefore it shouldn't be dynamically created on the device.
Bug: 180675126
Test: m microdroid_uboot_env
Change-Id: If49634293f2fe7fbb82fae243632480fc7d72d30
diff --git a/microdroid/uboot-env.txt b/microdroid/uboot-env.txt
new file mode 100644
index 0000000..0ef66b8
--- /dev/null
+++ b/microdroid/uboot-env.txt
@@ -0,0 +1,8 @@
+# Static u-boot environment variables for microdroid. See b/180481192
+
+bootcmd=boot_android virtio -
+
+# 0:2 is the misc partition
+bootdevice=0:2
+bootdelay=0
+fdtaddr=0x80000000