packages: convert Github http:// users to the github helper

[Thomas: taken from Mischa original github patch.]

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
diff --git a/package/yajl/yajl.mk b/package/yajl/yajl.mk
index 6f9c640..ff64123 100644
--- a/package/yajl/yajl.mk
+++ b/package/yajl/yajl.mk
@@ -5,7 +5,7 @@
 ################################################################################
 
 YAJL_VERSION = 2.0.4
-YAJL_SITE = http://github.com/lloyd/yajl/tarball/$(YAJL_VERSION)
+YAJL_SITE = $(call github,lloyd,yajl,$(YAJL_VERSION))
 YAJL_INSTALL_STAGING = YES
 YAJL_LICENSE = ISC
 YAJL_LICENSE_FILES = COPYING