meson: build: Initial commit, create config file

Create the meson.build and meson_options.txt to generate a config.h
file. Set the config default values to static as it's set currently
and the values that the recipe sets as a default (max number of
versions to 1 and media directory to /run/media).

Tested: Verified the meson-generated config.h fle was equivalent to
        the autotools-generated one. Verified config values were
        changed with the config options, ex: 'meson build -Dbmc-layout=ubi'

Change-Id: I987db2e28db209e4f16b305375d007ad34ff9bd3
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
2 files changed