graphics/krita: update upstream location, switch to tar.xz

Reported by:	VVD in IRC

graphics/krita/Makefile

@@ -3,7 +3,7 @@
 PORTNAME=	krita
 DISTVERSION=	4.2.7.1
 CATEGORIES=	graphics kde
-MASTER_SITES=	KDE/stable/${PORTNAME}/${DISTVERSION:R}
+MASTER_SITES=	KDE/stable/${PORTNAME}/${DISTVERSION}
 DIST_SUBDIR=	KDE/${PORTNAME}
 
 MAINTAINER=	kde@FreeBSD.org
@@ -34,7 +34,7 @@ LIB_DEPENDS=	libImath.so:graphics/ilmbase \
 # Disable ninja generator for now (with gmake), until the duplicate test targets are resolved upstream.
 USES=		cmake:noninja gmake compiler:c++11-lib desktop-file-utils \
 		eigen:3 gettext jpeg kde:5 pkgconfig python:3.4+ qt:5 \
-		shared-mime-info xorg
+		shared-mime-info tar:xz xorg
 USE_KDE=	archive completion config coreaddons crash guiaddons i18n \
 		itemmodels itemviews kio service widgetsaddons windowsystem
 USE_QT=		concurrent core dbus declarative gui multimedia network printsupport \

graphics/krita/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1570041411
-SHA256 (KDE/krita/krita-4.2.7.1.tar.gz) = 28218030edca9dfa1c7e255401ca6fc8fe0e5329f7611cfc196e35746d312086
-SIZE (KDE/krita/krita-4.2.7.1.tar.gz) = 246204685
+TIMESTAMP = 1572729992
+SHA256 (KDE/krita/krita-4.2.7.1.tar.xz) = 7e0b7cf7688edd93c9bee53547faa0dece85da22f3e3cb86562b9c991791a4eb
+SIZE (KDE/krita/krita-4.2.7.1.tar.xz) = 164304772