tests: Do not use check-local magic as dependency

* tests/gpg/Makefile.am: Use BUILT_SOURCES instead of check-local
and initial.test.
* lang/qt/tests/Makefile.am: Ditto.

This fixes "make dist" failure when source tree is clean:

git clean -dxf
autoreconf -ivf
./configure
make dist

BUILT_SOURCES should be used when file as generated without explicit
dependency. The check-local is all-am dependency, this means that it
will be resolved also in "make dist".

• Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>