Changes

native.tag.jar: include *.symbols

native.tag.jar: include *.symbols (fix)

Bug 1420: Add FFMpeg 4.* versioned lib-names and provide optional internal lib lookup

New property 'jogl.ffmpeg.lib' may be set to 'internal',
setting PREFER_SYSTEM_LIBS:=false (default it true)

Non system internal libraries are named 'internal_<basename>',
e.g. 'internal_avutil'.

System default libraries are named '<basename>',
e.g. 'avutil'.

If PREFER_SYSTEM_LIBS is true (default),
we lookup the default library first,
then the versioned library names and last the internal library.

If PREFER_SYSTEM_LIBS is false,
we lookup the internal library first,
then the versioned library names and last the default library.

Bug 1358: Add OSXUtil.GetWindowPixelScale(..)

It is now possible to retrieve the pixel scale [NSWindow backingScaleFactor]
after native creation by NEWT - as we have changed the lifecycly (all-in-one native method on AppKit)

Bug 1358: NewtCanvasSWT High-DPI: Use window-units where required instead of pixel-units

Commit ca7f0fb61b0a608b6e684a5bbde71f6ecb6e3fe0
did one thing wrong: Using the pixel-unit size for
NEWT child window operations where window-units are required.

Bug 1358: NewtCanvasSWT High-DPI: Propagate pixelScale to NEWT-Child and utilize it for convertTo*Units(..)

Detected pixelScale on SWT should be propagated to the NEWT Child
using 'newtChild.setSurfaceScale(pixelScale)' to allow an impact.

Also utilize computed pixel for converTo*Units(..) implementation.

Bug 1358: MacOS NEWT WindowDriver / NewtCanvasSWT High-DPI:

Even w/ commit fb211581fefc994d1458a2a74801dfb937170f39, propagating the SWT pixelScale to NEWT-Child,
hasPixelScale was never updated via updatePixelScale() through native callback [NSView viewDidChangeBackingProperties]!

[NSView viewDidChangeBackingProperties] not being called on [created] child windows (NewtCanvasSWT)
confused the overal pixelScale state, i.e. no hasPixelScale update via updatePixelScale(..).

This change explicitly queries OSXUtil.GetWindowPixelScale(handle) (commit e6d53e29f05a6928192f6c4a988b2aa558be8d65)for:

1) updateMaxScreenPixelScaleByWindowHandle(..), which now updates the actual hasPixelScale after native creation

and for

2) setSurfaceScale(..), which directly calls updatePixelScale(..) with the queried actual pixelScale
instead of relying on the native callback [NSView viewDidChangeBackingProperties].

native.tag.jar: Revert explicit inclusion of *.symbols file

reverting commit cb092e517461b3047c966c38e92668010a3b7ef6

fix windows build scripts