feat: build proect for restproxy

proxy_c/third-lib/libevent/cmake/LibeventConfigBuildTree.cmake.in

@@ -0,0 +1,17 @@
+# - Config file for the Libevent package
+# It defines the following variables
+#  LIBEVENT_INCLUDE_DIRS - include directories for FooBar
+#  LIBEVENT_LIBRARIES    - libraries to link against
+
+# Get the path of the current file.
+get_filename_component(LIBEVENT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+
+# Set the include directories.
+set(LIBEVENT_INCLUDE_DIRS "@EVENT__INCLUDE_DIRS@")
+
+# Include the project Targets file, this contains definitions for IMPORTED targets.
+include(${LIBEVENT_CMAKE_DIR}/LibeventTargets.cmake)
+
+# IMPORTED targets from LibeventTargets.cmake
+set(LIBEVENT_LIBRARIES event event_core event_extra)
+