added minmal libaries

lib/lwrb/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.12)
+
+project(lwrb C)
+
+add_library(${PROJECT_NAME} "")
+target_sources(${PROJECT_NAME}
+        PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}/lwrb.c
+        INTERFACE
+        ${CMAKE_CURRENT_LIST_DIR}/lwrb.h
+)
+
+target_include_directories(${PROJECT_NAME}
+        INTERFACE
+        ${CMAKE_CURRENT_LIST_DIR}
+)