build: Add wrapfiles for dependencies

- Update meson.build and add wrapfiles so that all dependencies are
handled as subprojects.

- This allows builds completely outside of bi

build: Add wrapfiles for dependencies

- Update meson.build and add wrapfiles so that all dependencies are
handled as subprojects.

- This allows builds completely outside of bitbake or an SDK.
refer: https://gerrit.openbmc-project.xyz/c/openbmc/phosphor-virtual-sensor/+/42349

Tested: built ledManager repo successfully using `meson build`.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I35db603d4aa9c2eee41c3cfb27eba6953950fe44

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