[RFC]: vdummy shortcut for transitional packages

Every transitional package has at least these 3 common variables:

• build_style=meta - otherwise the build would fail because of an empty package
• depends=... - usually ${sourcepkg}>=${version}_${revision}, but often ${version}_${revision} is left out or ${sourcepkg} is replaced by something else, for example ${sourcepkg}-devel
• short_desc+=" transitional package" or an equivalent, many versions currently exist in packages

a few examples:

antimicro_package() { 
	build_style=meta
	depends="${sourcepkg}"
	short_desc+=" - transitional dummy package"
}    

Gifsicle_package() {
	depends="gifsicle"
	short_desc+=" (transitional dummy package)"
	build_style=meta
}

This is a proposal for a vdummy function that fills these variables for the packager, for example:

antimicro_package() {
	vdummy ${sourcepkg}
}

vdummy should take one argument - the package name and use it in $depends - depends="$1>=${version}_${revision}". vdummy will also unify $short_desc for transitional packages, I would propose to use the - (transitional dummy package) style.