meson: rename options file

Using meson.options is now preferred.

Change-Id: I6be1bb33b22e0c47aa6cc3a5ed5863ef00b9ee64
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/vpd-manager/meson_options.txt b/vpd-manager/meson.options
similarity index 100%
rename from vpd-manager/meson_options.txt
rename to vpd-manager/meson.options