Get the second stage loader from the Load Options
Get the second stage loader from the Load Options

This commit replaces the 2nd stage loader path with the first
argument in the Load Options and moves the rest arguments (if any)
to the Load Options for the 2nd stage loader.

For example, to make shim to load elilo.efi, just create a new
boot entry with efibootmgr:

 # efibootmgr -c -L "shim elilo" -l "efi\\shim.efi" -u "elilo.efi"

rhinstaller/shim,android-ia/platform_external_uefi_shim,CyanogenMod/android_external_uefi_shim,android-ia/platform_external_uefi_shim,CyanogenMod/android_external_uefi_shim,android-ia/platform_external_uefi_shim,CyanogenMod/android_external_uefi_shim,rhinstaller/shim,rhinstaller/shim