Add .git .bzr and .hg to the list of default CPack ignore directories.

Modules/CPack.cmake

@@ -926,7 +926,7 @@ cpack_set_if_not_set(CPACK_SOURCE_TOPLEVEL_TAG "${CPACK_SYSTEM_NAME}-Source")
 cpack_set_if_not_set(CPACK_SOURCE_PACKAGE_FILE_NAME
   "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-Source")
 cpack_set_if_not_set(CPACK_SOURCE_IGNORE_FILES
-  "/CVS/;/\\\\\\\\.svn/;\\\\\\\\.swp$;\\\\\\\\.#;/#")
+  "/CVS/;/\\\\\\\\.svn/;/\\\\\\\\.bzr/;/\\\\\\\\.hg/;/\\\\\\\\.git/;\\\\\\\\.swp$;\\\\\\\\.#;/#")
 SET(CPACK_INSTALL_CMAKE_PROJECTS "${CPACK_SOURCE_INSTALL_CMAKE_PROJECTS}")
 SET(CPACK_INSTALLED_DIRECTORIES "${CPACK_SOURCE_INSTALLED_DIRECTORIES}")
 SET(CPACK_GENERATOR "${CPACK_SOURCE_GENERATOR}")