tree 4251fe73f0798b6ba376c0e0e74adaa61c24e532
parent 79a09a8dfcbf0edc5a264f2bb81fd67e851e951a
author Brad Bishop <bradleyb@fuzziesquirrel.com> 1579109096 -0500
committer Brad Bishop <bradleyb@fuzziesquirrel.com> 1581625893 +0000

meson: add support for valijson library vendoring

Abuse the meson subproject command to download valijson and build
against that when valijson is not found in the usual places.  This
enables the building and running of the unit tests without needing to
install valijson.

This is abuse because the subproject command will always fail - meson
only supports other meson projects as subprojects but it will download
the project, and since we don't actually build valijson but just use
headers this isn't a problem.

Change-Id: I2595b3deec73ac503934b91bdf52f72399032bcb
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>