[build2] Installation Error on Manjaro

[Boris Kolpackov]

Alex Syrnikov <san at masterspline.eu> writes:

> IMHO, build system MUST start whole process (not just compilers call)
> from setting environment for himself:
> 
> [...]
> 
> This will not only fix compiler run but other tools and IDE messages
> parsing. And off cause this will make exotic errors in external tools.

This will also change the language of the compiler diagnostics that
the user sees, which will be surprising.

I think passing LC_ALL=C to commands that the build system consumes
output of is a good start. If an IDE wants to run the entire build
process with a different locale, that's their choice.