Thorne.

  of plat-$(MACHDEP).

  use _PYTHON_PROJECT_BASE in distutils/sysconfig.py.

creates a broken PYTHON_FOR_BUILD variable when --build is missing.

Reported by: Roumen Petrov

Reported by: Roumen Petrov

Unlike 3.2, 3.3 and 3.x, which add "-IObjects -IPython -IInclude" to
BASECPPFLAGS when building out-of-tree, 2.7 only needs to add -IInclude
(for Python-ast.h and graminit.h).

Specifically, make sure the 'Object', 'Python' and 'Include' directories
in the build directory take precedence over the source directory if we're
an out-of-tree build.

Fix typeslots.inc so that it gets generated into the build directory.

  for host compiler.

  Add NEWS entry, rename _PROJECT_BASE to _PYTHON_PROJECT_BASE.

  for host compiler.

   require values set in CONFIG_SITE.