Ticket #4615: boost-build-project-config-location.patch

*** a/tools/build/v2/build-system.jam   2010-07-12 03:37:43.000000000 -0400
--- b/tools/build/v2/build-system.jam   2010-08-31 14:17:05.000000000 -0400
***************
*** 215,223 ****

  # Initializes a new configuration module.
  #
! local rule initialize-config-module ( module-name )
  {
!     project.initialize $(module-name) ;
      if USER_MODULE in [ RULENAMES ]
      {
          USER_MODULE $(module-name) ;
--- 215,223 ----

  # Initializes a new configuration module.
  #
! local rule initialize-config-module ( module-name : location ? )
  {
!     project.initialize $(module-name) : $(location) ;
      if USER_MODULE in [ RULENAMES ]
      {
          USER_MODULE $(module-name) ;
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*** 419,425 ****
      }
      if $(file)
      {
!         initialize-config-module project-config ;
          load-config project-config : project-config.jam : $(file:D) ;
      }
  }
--- 419,425 ----
      }
      if $(file)
      {
!         initialize-config-module project-config : $(file:D) ;
          load-config project-config : project-config.jam : $(file:D) ;
      }
  }