Update .{hg,git}ignore for Cygwin builds
diff --git a/.hgignore b/.hgignore
index 92896b7..6766bf9 100644
--- a/.hgignore
+++ b/.hgignore
@@ -44,6 +44,7 @@
 libpython*.a
 libpython*.so*
 libpython*.dylib
+libpython*.dll
 *.swp
 *.o
 *.pyc
@@ -87,8 +88,9 @@
 Tools/unicode/MAPPINGS/
 BuildLog.htm
 __pycache__
-Programs/_freeze_importlib
-Programs/_testembed
+Programs/_freeze_importlib{,.exe}
+Programs/_testembed{,.exe}
+Programs/pgen.exe
 .coverage
 coverage/
 externals/