Force the directory for installation to c:\program files

This is most likely not 100% correct, because we should use an
environment or ship a 64 bit installer instead, but for now it will
have to make due.

CMakeModules/CPackConfiguration.cmake

@@ -32,6 +32,7 @@ set(CPACK_IFW_PACKAGE_PUBLISHER "Plex")
 set(CPACK_IFW_PRODUCT_URL "https://plex.tv")
 set(CPACK_IFW_PACKAGE_ICON ${CMAKE_SOURCE_DIR}/bundle/win/Plex.ico)
 set(CPACK_IFW_PACKAGE_WINDOW_ICON ${CMAKE_SOURCE_DIR}/resources/images/icon.png)
+set(CPACK_IFW_TARGET_DIRECTORY "C:\\Program Files\\Plex Media Player")
 
 if(APPLE)
   set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY 0)