Change ${CMAKE_BINARY_DIR} to ${CMAKE_CURRENT_BINARY_DIR}

- if building as a submodule of another repository, installation of pkg-config files can fail because they may not be in the top-level binary directory

- changing ${CMAKE_BINARY_DIR} to ${CMAKE_CURRENT_BINARY_DIR} allow CMake to find the files for installation

Conflicts:
	CMakeLists.txt

Author: ds283

CMakeLists.txt

@@ -115,8 +115,8 @@ IF(JSONCPP_WITH_PKGCONFIG_SUPPORT)
 		"pkg-config/jsoncpp.pc.in"
 		"pkg-config/jsoncpp.pc"
 		@ONLY)
-	INSTALL(FILES "${CMAKE_BINARY_DIR}/pkg-config/jsoncpp.pc"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+	INSTALL(FILES "${CMAKE_CURRENT_BINARY_DIR}/pkg-config/jsoncpp.pc"
+		DESTINATION "${LIBRARY_INSTALL_DIR}/pkgconfig")
 ENDIF()
 
 IF(JSONCPP_WITH_CMAKE_PACKAGE)