File unbundle-fmt.patch of Package rstudio

diff --git a/src/cpp/CMakeLists.txt b/src/cpp/CMakeLists.txt
index b1a91eb..ff44703 100644
--- a/src/cpp/CMakeLists.txt
+++ b/src/cpp/CMakeLists.txt
@@ -580,7 +580,7 @@ endif()
 
 # external libraries
 add_subdirectory(ext)
-include_directories(SYSTEM "${FMT_SOURCE_DIR}/include")
+find_package(fmt REQUIRED)
 
 # shared library
 add_subdirectory(shared_core)