Suppress external templates with Mingw32 - it seems to cause issues with dll's.

Fix match_results.swap.
Add missing namespace qualifiers to ICU code: fixes #3631.

[SVN r57739]

libs/regex

@@ -1 +1 @@
-Subproject commit 6e1f3dccebaa3697eff017dcd7ccd5e42840b1f6
+Subproject commit 97005c20175cbcf6e7140c8e52d53b463742beee