Consolidate the installation paths and make sure we have decent defaults.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4873 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/cmake/BuildPackages.cmake b/cmake/BuildPackages.cmake
index 8bc25b8..8b3527a 100644
--- a/cmake/BuildPackages.cmake
+++ b/cmake/BuildPackages.cmake
@@ -86,5 +86,5 @@
 # Common
 #
 
-install(FILES ${CMAKE_SOURCE_DIR}/LICENCE.TXT DESTINATION doc)
-install(FILES ${CMAKE_SOURCE_DIR}/README.txt DESTINATION doc)
+install(FILES ${CMAKE_SOURCE_DIR}/LICENCE.TXT DESTINATION ${DOC_DIR})
+install(FILES ${CMAKE_SOURCE_DIR}/README.txt DESTINATION ${DOC_DIR})