File x.patch of Package mingw64-cJSON

diff --git a/library_config/libcjson.pc.in b/library_config/libcjson.pc.in
index de48fe0..01fd4ec 100644
--- a/library_config/libcjson.pc.in
+++ b/library_config/libcjson.pc.in
@@ -1,3 +1,4 @@
+prefix=@CMAKE_INSTALL_PREFIX@
 libdir=@CMAKE_INSTALL_FULL_LIBDIR@
 includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@