Skip Python subprocess calls in import_packages testcase on Windows

Getting these kind of errors on Appveyor which uses mingw/cygwin to run
a Python interpreter:

Native windows Python 3.6 running under cygwin and mingw Python 3.7 running under mingw:
  Fatal Python error: _Py_HashRandomization_Init: failed to get random
  numbers to initialize Python

Cygwin Python 2.7 running under cygwin:
  0 [main] python2.7 496 child_info_fork::abort: address space needed by '_foo.dll' (0x6D0000)
  is already occupied

1 files changed, 7 insertions, 2 deletions

diff --git a/Examples/python/import_packages/same_modnames1/runme.py b/Examples/python/import_packages/same_modnames1/runme.py
index a3a579a17..a64551bfd 100644
--- a/Examples/python/import_packages/same_modnames1/runme.py
+++ b/Examples/python/import_packages/same_modnames1/runme.py
@@ -2,6 +2,12 @@ import os.path
 import subprocess
 import sys
 
+def run_except_on_windows(commandline, env=None):
+    if os.name != "nt" and sys.platform != "cygwin":
+        # Strange failures on windows/cygin/mingw
+        subprocess.check_call(commandline, env=env, shell=True)
+        print("  Finished running: " + commandline)
+
 # Test import of same modules from different packages
 testname = os.path.basename(os.path.dirname(os.path.abspath(__file__)))
 print "Testing " + testname + " - %module(package=...) + python 'import' in __init__.py"
@@ -17,5 +23,4 @@ if classname.find("pkg2.foo.Pkg2_Foo") == -1:
 print "  Successfully created object pkg2.foo.Pkg2_Foo"
 
 commandline = sys.executable + " -m pkg2.foo"
-subprocess.check_call(commandline, shell=True)
-print("  Finished running: " + commandline)
+run_except_on_windows(commandline)