Another attempt at fixing 64-bit ICU support.

dll-path for 64-bit builds still isn't set correctly.
Refs #4864.

[SVN r66659]

libs/regex

@@ -1 +1 @@
-Subproject commit cef369efa5dc8245fc7f09a0cd2c2741050839b1
+Subproject commit dd9d022d7ca82f149a8ea716751f56dc537ba942