rabbitmq-c: bump to version 0.8.0

Made use of github helper because no official tarball
is released.

Signed-off-by: Joris Lijssens <joris.lijssens@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rabbitmq-c/rabbitmq-c.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256 23df349a7d157543e756acc67e47b217843ecbdafaefe3e4974073bb99d8a26d rabbitmq-c-0.7.1.tar.gz
+sha256 d8ed9dcb49903d83d79d7b227da35ef68c60e5e0b08d0fc1fb4e4dc577b8802b rabbitmq-c-v0.8.0.tar.gz

package/rabbitmq-c/rabbitmq-c.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-RABBITMQ_C_VERSION = 0.7.1
-RABBITMQ_C_SITE = https://github.com/alanxz/rabbitmq-c/releases/download/v$(RABBITMQ_C_VERSION)
+RABBITMQ_C_VERSION = v0.8.0
+RABBITMQ_C_SITE = $(call github,alanxz,rabbitmq-c,$(RABBITMQ_C_VERSION))
 RABBITMQ_C_LICENSE = MIT
 RABBITMQ_C_LICENSE_FILES = LICENSE-MIT
 RABBITMQ_C_INSTALL_STAGING = YES