package/luvi: bump version to 2.7.6

Switched to github helper because upstream does not provide the tarball
anymore.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/luvi/luvi.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256  b36a3b96ec5852398338bc38567c5bb589783487c65130e1d702ff98fac3a6b7  luvi-src-v2.7.5.tar.gz
+sha256 65d3ded5007d5bb58fc3b76013913596fd42ed7326310d67c668ddf9a017a179  luvi-v2.7.6.tar.gz

package/luvi/luvi.mk

@@ -4,9 +4,8 @@
 #
 ################################################################################
 
-LUVI_VERSION = v2.7.5
-LUVI_SOURCE = luvi-src-$(LUVI_VERSION).tar.gz
-LUVI_SITE = https://github.com/luvit/luvi/releases/download/$(LUVI_VERSION)
+LUVI_VERSION = v2.7.6
+LUVI_SITE = $(call github,luvit,luvi,$(LUVI_VERSION))
 LUVI_LICENSE = Apache-2.0
 LUVI_LICENSE_FILES = LICENSE.txt
 LUVI_DEPENDENCIES = libuv luajit luv host-luajit