test_distutils should only dump stdout/stderr on compilation failure, but hide them on success (by default).

Example of output:

http://buildbot.python.org/all/builders/x86%20Windows7%203.x/builds/588/steps/test/logs/stdio

0:58:52 [277/405/1] test_distutils passed (124 sec) -- running: test_tokenize (322 sec)
xxmodule.c
   Creating library d:\temp\tmp1byjf67b\Debug\temp\tmp1byjf67b\xx_d.cp37-win32.lib and object d:\temp\tmp1byjf67b\Debug\temp\tmp1byjf67b\xx_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
foo.c
   Creating library d:\temp\tmp78_8qa47\tempt\temp\tmpduqip5h3\foo_d.cp37-win32.lib and object d:\temp\tmp78_8qa47\tempt\temp\tmpduqip5h3\foo_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
foo.c
   Creating library d:\temp\tmp78_8qa47\tempt\temp\tmpduqip5h3\foo_d.cp37-win32.lib and object d:\temp\tmp78_8qa47\tempt\temp\tmpduqip5h3\foo_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
xxmodule.c
   Creating library d:\temp\tmpruuda1qt\Debug\temp\tmpruuda1qt\xx_d.cp37-win32.lib and object d:\temp\tmpruuda1qt\Debug\temp\tmpruuda1qt\xx_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
foo.c
   Creating library d:\temp\tmpxzrh56h5\tempt\temp\tmpht642isv\foo_d.cp37-win32.lib and object d:\temp\tmpxzrh56h5\tempt\temp\tmpht642isv\foo_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
foo.c
   Creating library d:\temp\tmpxzrh56h5\tempt\temp\tmpht642isv\foo_d.cp37-win32.lib and object d:\temp\tmpxzrh56h5\tempt\temp\tmpht642isv\foo_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance
xxmodule.c
   Creating library build\temp.win32-3.7-pydebug\Debug\xx_d.cp37-win32.lib and object build\temp.win32-3.7-pydebug\Debug\xx_d.cp37-win32.exp
LINK : /LTCG specified but no code generation required; remove /LTCG from the link command line to improve linker performance

D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\build\test_python_204>exit 1 

D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\build\test_python_204>exit 0