Enable dead_belowdot with de layout.

AltGr + j returns dead_belowdot in de layout.
E.g. AltGr + j, s returns U+1E63 with de.
XLookupString can get dead_belowdot but the return value is 0.
I think XLookupString does not failed with return value 0.

BUG=RH#921164

Review URL: https://codereview.appspot.com/7812045
Fixed installed but unpackaged files with rpm-build 4.11.1 and %doc.

BUG=RH#992554
TEST=rpmbuild

Review URL: https://codereview.appspot.com/12735043