wic: bootimg-efi: add a title source parameter

Sometimes the users might want to change the title showing on UEFI
booting screen, so far it's hard-coded to 'boot'.

There is not a easy way to customize it in current design, I tried
firstly with '--configfile', but that does not work with --use-uuid,
since the later option will generate a UUID and write it to boot
config, only when the former option is not enabled.

So a new source parameter 'titile' is added in this patch, it defaults
to 'boot' to be consistent with the original title.

(From OE-Core rev: 37e16188ef3b1b328eb18b3e459c051c9c9f0332)

Signed-off-by: Ming Liu <liu.ming50@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/plugins/source/bootimg-efi.py

@@ -77,12 +77,13 @@ class BootimgEFIPlugin(SourcePlugin):
         if not custom_cfg:
             # Create grub configuration using parameters from wks file
             bootloader = creator.ks.bootloader
+            title = source_params.get('title')
 
             grubefi_conf = ""
             grubefi_conf += "serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1\n"
             grubefi_conf += "default=boot\n"
             grubefi_conf += "timeout=%s\n" % bootloader.timeout
-            grubefi_conf += "menuentry 'boot'{\n"
+            grubefi_conf += "menuentry '%s'{\n" % (title if title else "boot")
 
             kernel = "/bzImage"
 
@@ -152,9 +153,10 @@ class BootimgEFIPlugin(SourcePlugin):
         if not custom_cfg:
             # Create systemd-boot configuration using parameters from wks file
             kernel = "/bzImage"
+            title = source_params.get('title')
 
             boot_conf = ""
-            boot_conf += "title boot\n"
+            boot_conf += "title %s\n" % (title if title else "boot")
             boot_conf += "linux %s\n" % kernel
             boot_conf += "options LABEL=Boot root=%s %s\n" % \
                              (creator.rootdev, bootloader.append)