[qt/f14] (4 commits) ...fix QMAKE_LIBDIR_QT, for missing QT_SHARED define (#725183)

[Rex Dieter]

Summary of changes:

  b70808d... fix bug reference (*)
  1888dd4... Adding qt-sql-ibase driver for qt (#719002) qvfb subpackage (*)
  18261c6... BR: libXtst-devel for qvfb (*)
  fa9aa5e... fix QMAKE_LIBDIR_QT, for missing QT_SHARED define (#725183) (*)

(*) This commit already existed in another branch; no separate mail sent