bootstrap ldc 1.x.x on non-x86 platforms

[Konstantinos Margaritis via digitalmars-d-ldc]

Hi all,

Previous ldc versions were built on powerpc/ppc64le/arm* directly but current
ldc build-depends on itself. The problem is that previous versions had
problems and using those debs caused failures on all these platforms:

https://buildd.debian.org/status/package.php?p=ldc

Is there any other way to build the 1.0.0 front-end on these platforms some
other way? It won't have to be a supported solution, just a one-off thing
until I get a working package for each arch.

Konstantinos