added rockspec for 0.5.0 version

rockspecs/kafka-0.5.0-1.rockspec

@@ -0,0 +1,29 @@
+package = "kafka"
+version = "0.5.0-1"
+source = {
+    url = "git://github.com/tarantool/tnt-kafka.git",
+    tag = "v0.5.0",
+}
+description = {
+    summary = "Kafka library for Tarantool",
+    homepage = "https://github.com/tarantool/tnt-kafka",
+    license = "Apache",
+}
+dependencies = {
+    "lua >= 5.1" -- actually tarantool > 1.6
+}
+external_dependencies = {
+    TARANTOOL = {
+        header = 'tarantool/module.h'
+    }
+}
+build = {
+    type = 'cmake';
+    variables = {
+        CMAKE_BUILD_TYPE="RelWithDebInfo",
+        TARANTOOL_DIR="$(TARANTOOL_DIR)",
+        TARANTOOL_INSTALL_LIBDIR="$(LIBDIR)",
+        TARANTOOL_INSTALL_LUADIR="$(LUADIR)",
+        STATIC_BUILD="$(STATIC_BUILD)"
+    }
+}