ibus: avoid showing the password ont he GNOME lock screen

-
This is an additional fix patch for ibus to avoid the wrong
IBus.InputPurpose.PASSWORD advertisement, which leads to the
password text appearance on GNOME3 lockscreen (bnc#847718)

Fixed bugs
bnc#847718
Typed password on the GNOME lock screen is not hidden if IBus is active
CVE-CVE-2013-4509
Typed password on the GNOME lock screen is not hidden if IBus is active
Selected Binaries
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