[tlbuild] New ICU tests fail on aarch64-linux (on Debian 10)

[ttk at t-lab.opal.ne.jp]

Thank you for your feedback.
I guess it is due to an uninitialized variable "status".
I hope r60326 would fix the issue.

Takuji

> However, on a few platforms your newly introduced safeguards (to catch
> u_strFromUTF8() errors) got triggered:
> 
> darwin-arm64
> [ICU] Input string seems malformed.: U_ILLEGAL_ARGUMENT_ERROR
> https://build.contextgarden.net/#/builders/88/builds/151/steps/3/logs/stdio
> 
> freebsd-amd64
> [ICU] Input string seems malformed.: U_INVALID_TABLE_FORMAT
> https://build.contextgarden.net/#/builders/56/builds/827/steps/3/logs/stdio