am e45c8607: Merge changes Ibc943b75,Ib4ccf373,I30ff439b,I7bde0130

* commit 'e45c8607':
  set a prebuilt directory name for the 2nd arch
  add vendor directories to gdb shared library search path
  add 2nd arch gcc to the path
  fix paths when 2nd arch gcc is a different version