vcl: kde4: [loplugin:saloverride]

Change-Id: I215a53b468710ce26d2729880f3dd9fcd27a30da
scp2: move pdfimport library to AutoInstall

Change-Id: Iac7d30ea181edbc479034e7b6f8eea285d7f6fbb
gbuild: fix build of installation set with missing .ui translations

As demonstrated by commit b875362cd576b29aee4da899335b8d8f6c74d192,
scp2 will reference all languages' UIConfig zip file, but gbuild only
builds those that have existing input files from translations;
tweak UIConfig class to always build a zip file, and the Zip command to
work with no inputs as well, which requires a little hack.

Change-Id: If6dbb07aa856c94802b9abdcaa20ba03e59d37fa