init repo.

third_party/jsoncpp/pkg-config/jsoncpp.pc.in

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@libdir_for_pc_file@
+includedir=@includedir_for_pc_file@
+
+Name: jsoncpp
+Description: A C++ library for interacting with JSON
+Version: @PROJECT_VERSION@
+URL: https://github.com/open-source-parsers/jsoncpp
+Libs: -L${libdir} -ljsoncpp
+Cflags: -I${includedir}