qt,tests: Take care for old DSA key using deprecated digest algo.
qt,tests: Take care for old DSA key using deprecated digest algo.

* lang/qt/tests/t-remarks.cpp (initTestCase): Supply
allow-weak-key-signatures flag for GnuPG 2.3, which
normally rejects use of SHA1 digest.

Signed-off-by: NIIBE Yutaka <34feb69f206f6fec69fb4bd79c126fcbde2c8e6a@fsij.org>

gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme