Qt deploy for Windows

[SirLynix]

xmake currently supports qt deploying for android and macos, a similar tool exists for windows (windeployqt.exe) and this PR adds support for it.

It's based on qt.deploy.macos which is the closest from what exists on Windows.

Here's an output I got by using it:

checking for vswhere.exe ... C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe
C:\Projets\Libs\Qt\5.15.0\msvc2019_64\bin\windeployqt.exe --force --verbose=1 test_qt\bin\BurgWarMapEditor.exe
C:\Projets\Burgwar\BurgWar\test_qt\bin\BurgWarMapEditor.exe 64 bit, release executable
Adding Qt5Svg for qsvgicon.dll
Direct dependencies: Qt5Core Qt5Gui Qt5Widgets
All dependencies   : Qt5Core Qt5Gui Qt5Widgets
To be deployed     : Qt5Core Qt5Gui Qt5Svg Qt5Widgets
Updating Qt5Core.dll.
Updating Qt5Gui.dll.
Updating Qt5Svg.dll.
Updating Qt5Widgets.dll.
Updating libGLESv2.dll.
Updating libEGL.dll.
Updating D3Dcompiler_47.dll.
Updating opengl32sw.dll.
Updating vc_redist.x64.exe.
Creating directory C:/Projets/Burgwar/BurgWar/test_qt/bin/iconengines.
Updating qsvgicon.dll.
Creating directory C:/Projets/Burgwar/BurgWar/test_qt/bin/imageformats.
Updating qgif.dll.
Updating qicns.dll.
Updating qico.dll.
Updating qjpeg.dll.
Updating qsvg.dll.
Updating qtga.dll.
Updating qtiff.dll.
Updating qwbmp.dll.
Updating qwebp.dll.
Creating directory C:/Projets/Burgwar/BurgWar/test_qt/bin/platforms.
Updating qwindows.dll.
Creating directory C:/Projets/Burgwar/BurgWar/test_qt/bin/styles.
Updating qwindowsvistastyle.dll.
Creating C:\Projets\Burgwar\BurgWar\test_qt\bin\translations...
Creating qt_ar.qm...
Creating qt_bg.qm...
Creating qt_ca.qm...
Creating qt_cs.qm...
Creating qt_da.qm...
Creating qt_de.qm...
Creating qt_en.qm...
Creating qt_es.qm...
Creating qt_fi.qm...
Creating qt_fr.qm...
Creating qt_gd.qm...
Creating qt_he.qm...
Creating qt_hu.qm...
Creating qt_it.qm...
Creating qt_ja.qm...
Creating qt_ko.qm...
Creating qt_lv.qm...
Creating qt_pl.qm...
Creating qt_ru.qm...
Creating qt_sk.qm...
Creating qt_uk.qm...
Creating qt_zh_TW.qm...

Please note this PR has still some problems/questions I couldn't fix by myself:

• I'm searching for the app file (.exe) using

    local installfile = path.join(target:installdir(), "bin", target:basename() .. ".exe")

is this correct?

• I tried to keep the progression print but it seems opt doesn't exist

    -- trace progress info
    -- progress.show(opt.progress, "${color.build.target}generating.qt.app %s.app", target:basename())

• windeployqt.exe will try to fetch some files from Visual Studio to copy a runtime installer, and it needs a VCINSTALLDIR env for that, I did something that works for me but should be improved:

    -- do deploy
    local vs_studio = find_vstudio()

    -- Find Visual Studio
    local installDir = path.join(vs_studio["2019"].vcvarsall[target:arch()].VSInstallDir, "VC")
    os.addenv("VCINSTALLDIR", installDir)

• Instead of deploying everytime the application is built, I'm deploying only on installation. I did this because the deploying takes some time. So I'm not sure if it should be done on build or install.
• I did it also for the qt.console rule, as the fact it's a console application doesn't prevent it from needing Qt DLL and suchs.

Here you are!

[waruqi]

Thanks!