dbus: disable assertions and enable only modular tests

dbus: disable assertions and enable only modular tests

There was a report that enabling assertions and all tests results in
notices in log.do_configure:

NOTE: building with unit tests increases the size of the installed library and renders it insecure.
NOTE: building with assertions increases library size and decreases performance.

This was overlooked when dbus and dbus-tests recipes were merged;
enabling all tests and assertions still requires a special, separate
build of dbus. If those tests are useful this could be revisited.
Until then, we should use productions settings for the main recipe.

Buildhistory-diff:
packages/core2-64-poky-linux/dbus/dbus-dbg: PKGSIZE changed from 9958176 to 8627824 (-13%)
packages/core2-64-poky-linux/dbus/dbus-lib: PKGSIZE changed from 544347 to 346339 (-36%)
packages/core2-64-poky-linux/dbus/dbus-ptest: PKGSIZE changed from 3524983 to 3116951 (-12%)
packages/core2-64-poky-linux/dbus/dbus-ptest: FILELIST: removed "/usr/share/installed-tests/dbus/test-dbus-launch-eval.sh_with_config.test /usr/share/installed-tests/dbus/test-counter_with_config.test /usr/libexec/installed-tests/dbus/test-dbus-launch-eval.sh /usr/libexec/installed-tests/dbus/test-dbus-launch-x11.sh /usr/share/installed-tests/dbus/test-counter.test /usr/libexec/installed-tests/dbus/test-counter /usr/share/installed-tests/dbus/test-dbus-launch-x11.sh.test /usr/share/installed-tests/dbus/test-dbus-launch-x11.sh_with_config.test /usr/share/installed-tests/dbus/test-dbus-launch-eval.sh.test"
packages/core2-64-poky-linux/dbus/dbus: PKGSIZE changed from 510939 to 350331 (-31%)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>