Only put bin-wrappers in the PATH (not GIT_EXEC_PATH), to emulate the
default installed user environment, and ensure all the programs run
correctly in such an environment.  This is now the default, although
it can be overridden with a --with-dashes test option when running
tests.
Signed-off-by: NMatthew Ogilvie <mmogilvi_git@miniinfo.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>