'make' with no target always re-links X11workbench, but should NOT

[bombasticbob]

as a side effect of adding a pseudo-target to build JUST X11workbench (using the debug/release library created via the 'configure' settings), X11workbench will re-link every time. This is because it doesn't have a proper build dependency for lib/libX11workbenchToolkit.a

Additionally, when using 'make', the library will build 3 times. Normally this isn't a problem, as the configure options need to be used for X11workbench, while a separate debug and release version of the library need to be built for the 'install'.

Consider modifying the dependencies for 'install' vs a normal build to accomodate this.