tree aa1b828d77035400a88dbd36c77e55bde289f228
parent 93aebf6671f2aa6e8ed2638b1743791b02e3eeb6
author Parag Dixit <paragdixit@google.com> 1622856568 -0700
committer Parag Dixit <paragdixit@google.com> 1623093399 +0000

[third_party][openthread] Split build targets

Splitting build targets for legacy extensions which applies related
defines for all build targets. Also use openthread-confing-fuchsia.h as
default config file for fuchsia (instead of opentherad-config-android.h)

This is done by:
1) Creating two variants of config files:
   openthread-config-fuchsia.h and
   openthread-config-fuchsia-legacy-extensions.h

2) Split the top level "openthread_config" target into two by adding
"openthread_config_legacy_extensions"

3) Recursively split all the targets that depend on openthread_config
into two variants.

This is needed as previous change of applying defines at top level
doesn't have desired effect.

Bug: 73057
Tests: This is currently functionally a no-op on current fuchsia tree.
       Build goes through.
       Confirmed that defines are applied to all the files, and
       expected functionality is working with additional changes in
       fuchsia.git and vendor/google changes.

Change-Id: I4afdf63debef3244f89334ee9aed6cc798f8fa68
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/openthread/+/539461
Reviewed-by: Robert Quattlebaum <rquattle@google.com>