matchbox-session-sato: install GConf values directly instead of using schemas

Because both matchbox-session-sato and settings-daemon were attempting to
install their preferred values though schemas there was a race as to which ones
were used.

Revert matchbox-session-sato back to writing the values directly, adding a
dependency on gconf-native so that this can happen on the host.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
glib-2.0: disable tests for native builds, and respect ptest for LSB

Without disabling the tests in the native build, glib-2.0-native will need
libdbus-native to be present.  As we don't run the tests, disable them so we
don't have build failures due to missing dependencies.

Also, the LSB override was missing PTEST_CONF so the same problem could happen.
After adding PTEST_CONF the LSB override is identical to the non-overridden
EXTRA_OECONF, so remove it.

Finally, to be explicit, put --enable-module-tests in PTEST_CONF.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>