Meson, as provided by the SDK, would fail to fetch Wraps' sources on bare
systems (i.e. systems, that only provide little more than the SDK).
This change modifies the wrapper script so that it sets an environment
variable (unless it is already set) that is used to determine valid
certificates for secured connections.
It does not affect bitbake's interaction with meson.
The SDK's SSL directory was not searched, so meson would fail when it tried
to fetch sources via https, that were specified in wrap files.
Specifically `urllib` would fail:
```
<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)>
```
Caution: this patch depends on the underlying C library (i.e. openssl)
to consider this environment variable.
Signed-off-by: Leif Middelschulte <Leif.Middelschulte@klsmartin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
