synergy: change upstream location to fix download

The Github repository at https://github.com/symless/synergy no longer
exists, it has apparently been moved to
https://github.com/symless/synergy-core.

Fixes:

  http://autobuild.buildroot.net/results/77f43b5937f102822a5b4644551222fda62fa129/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/synergy/Config.in

@@ -12,7 +12,7 @@ config BR2_PACKAGE_SYNERGY
 	  operating systems, each with its own display,
 	  without special hardware.
 
-	  https://github.com/symless/synergy/
+	  https://github.com/symless/synergy-core/
 
 comment "synergy needs a toolchain w/ C++, wchar"
 	depends on BR2_PACKAGE_XORG7

package/synergy/synergy.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 SYNERGY_VERSION = v2.0.12-beta
-SYNERGY_SITE = $(call github,symless,synergy,$(SYNERGY_VERSION))
+SYNERGY_SITE = $(call github,symless,synergy-core,$(SYNERGY_VERSION))
 SYNERGY_LICENSE = GPL-2.0
 SYNERGY_LICENSE_FILES = LICENSE
 SYNERGY_DEPENDENCIES = xlib_libX11 xlib_libXtst