ui/qt: use relative path in qt.conf prefix

.orchestra/config/components/ui/qt.yml

@@ -129,7 +129,7 @@ builds:
 
       cat > "${TMP_ROOT}${ORCHESTRA_ROOT}/bin/qt.conf" <<EOF
       [Paths]
-      Prefix = $ORCHESTRA_ROOT
+      Prefix = ..
       EOF
 
       cd "${TMP_ROOT}${ORCHESTRA_ROOT}/mkspecs/linux-clang/"

.orchestra/config/components/ui/qt_creator.yml

@@ -50,8 +50,6 @@ builds:
       cd "$BUILD_DIR"
       (@= make @)
       (@= make @) install INSTALL_ROOT="$DESTDIR$ORCHESTRA_ROOT"
-      # TODO: debug why qtcreator looks for platform plugins in bin when the root is moved
-      # ln -s ../plugins/platforms "$DESTDIR$ORCHESTRA_ROOT/bin/platforms"
     dependencies:
       - host-libcxx
       - llvm