Universal variant for icu, which many ports depend on, doesn't work

[CharlesJS]

Many ports depend on the icu port. Unfortunately, its universal build does not work.

When trying to build a dependent port:

` $ sudo port install gnutls +universal Warning: The macOS 11.2 SDK does not appear to be installed. Ports may not build correctly. Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'. ---> Computing dependencies for gnutls Error: Cannot install libxslt for the archs 'arm64 x86_64' because Error: its dependency icu cannot build for the required archs. Error: Follow ​https://guide.macports.org/#project.tickets to report a bug. Error: Processing of port gnutls failed `

But:

` $ port variants icu icu has the variants:

universal: Build for multiple architectures

`

And yet: ` $ sudo port install icu +universal ---> Fetching archive for icu ---> Attempting to fetch icu-67.1_3.darwin_20.x86_64.tbz2 from ​https://pek.cn.packages.macports.org/macports/packages/icu ---> Attempting to fetch icu-67.1_3.darwin_20.x86_64.tbz2.rmd160 from ​https://pek.cn.packages.macports.org/macports/packages/icu ---> Installing icu @67.1_3 ---> Activating icu @67.1_3 ---> Cleaning icu ---> Updating database of binaries ---> Scanning binaries for linking errors ---> No broken files found. ---> No broken ports found.

$ file /opt/local/lib/libicudata.dylib /opt/local/lib/libicudata.dylib: Mach-O 64-bit dynamically linked shared library x86_64 `