[Buildroot] Hash checking infrastructure

[Yann E. MORIN]

Mike, All,

On 2015-07-05 00:00 -0500, Mike spake thusly:
[--SNIP--]
> I fell into this strange behavior when trying a simple(tm)
> LuaJIT version bump (from 2.0.3 -> 2.0.4).

Note that we already have luajit 2.0.4 in Buildroot.

Regards,
Yann E. MORIN.

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