Change folder name build to buildjson

- If change to use meson build, meson will automake build folder,
and this will overwrite the origin folder and miss the buildjson
files.

Signed-off-by: Ha

Change folder name build to buildjson

- If change to use meson build, meson will automake build folder,
and this will overwrite the origin folder and miss the buildjson
files.

Signed-off-by: Harvey Wu <Harvey.Wu@quantatw.com>
Change-Id: Idfc4852bf56ed8f6c04e1b4be78ce40e08539132

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