Split test "basic_import" into two tests: "basic_import", which is run on all platforms, and "basic_import_executable", which is SKIPped on non-posix platforms.
Split test "basic_import" into two tests: "basic_import", which
is run on all platforms, and "basic_import_executable", which
is SKIPped on non-posix platforms.

Patch by: Brian Denny <brian@briandenny.net>

* subversion/tests/clients/cmdline/basic_tests.py
  - added test 'basic_import_executable'
  - pared down 'basic_import' to simpler, platform-neutral functionality

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion