Update icu to v68.1

Update the patches to reflect recent updates to the build system.

Author: donny-dont

README.md

@@ -15,7 +15,7 @@
 
 | Library | Version | Release Date |
 |---|:---:|:---:|
-| [icu](http://site.icu-project.org) | 67.1 | 2020-04-22 |
+| [icu](http://site.icu-project.org) | 68.1 | 2020-10-28 |
 | [zlib](https://github.com/zlib-ng/zlib-ng) | 1.9.9-beta1 | 2020-09-27 |
 | [brotli](https://github.com/google/brotli) | 1.0.9 | 2020-08-27 |
 | [libressl](https://www.libressl.org) | 3.2.2 | 2020-10-18 |

ports/icu/CONTROL

@@ -1,5 +1,5 @@
 Source: icu
-Version: 67.1
+Version: 68.1
 Description: |
   ICU is a mature, widely used set of C/C++ and Java libraries providing
   Unicode and Globalization support for software applications. ICU is widely