vigra: update download URL and checksum

The project Vigra was moved to GitHub.
Download URL and checksum changed.

see https://github.com/mxe/mxe/issues/1519

src/vigra.mk

@@ -3,10 +3,10 @@
 PKG             := vigra
 $(PKG)_IGNORE   :=
 $(PKG)_VERSION  := 1.9.0
-$(PKG)_CHECKSUM := 8fbdccb553a4925323098ab27b710fbc87d48f37bf81d404994936a31a31cf01
+$(PKG)_CHECKSUM := dc041f7ccf838d4321e9bcf522fece1758768dd7a3f8350d1e83e2b8e6daf1e6
 $(PKG)_SUBDIR   := vigra-$(word 1,$(subst -, ,$($(PKG)_VERSION)))
-$(PKG)_FILE     := vigra-$($(PKG)_VERSION)-src.tar.gz
-$(PKG)_URL      := http://hci.iwr.uni-heidelberg.de/vigra-old-versions/$($(PKG)_FILE)
+$(PKG)_FILE     := vigra-$($(PKG)_VERSION).tar.gz
+$(PKG)_URL      := https://github.com/ukoethe/vigra/archive/Version-$(subst .,-,$($(PKG)_VERSION)).tar.gz
 $(PKG)_DEPS     := gcc jpeg libpng openexr tiff
 
 define $(PKG)_UPDATE