meson: Disable 'verify-signature' option by default

Currently the 'verify-signature' option is enabled by default, and
there is no way to disable it via recipe PACKAGECONFIG.
As a result 'Software::Version::Error::InvalidSignature' is generated
on unsigned updates even if user did not enable signature verification
feature.
Disable 'verify-signature' option by default to correct the issue.
If user enables signature verification feature the option
'verify-full-signature' is enabled which provides desired functionality.

Change-Id: Ie143bf7922115ec529a0d30fb68e7c26bce0be77
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
1 file changed