[Buildroot] Still no answer for a contribution made in March

[Ulf Samuelsson <ulf.samuelsson@atmel.com>]

> 
> Ulf> In August I think there will be time for implementation,
> Ulf> but we could discuss the underlying architecture before that.
> 
> Yes.
> 

How about this as a starting point?
The user can choose to define a "distribution" inside menuconfig.
There are a number of "known" distributions, which can be checked
for selection, or the user can supply free text.

The distribution is used to select a file containing package versions.

I.E:
BASH_VERSION:=1.10.3
LIBUSB_VERSION:=1.4.5
...
<EOF>

Any version defined here, will override the version number inside
the package makefile fragment.

All packages where this is supported, should have the patches named
<package>-<version>-<patchname>.patch[.$(ARCH)]

There should be a makefile targer to generate such version files.

As long as the package makefile does not change, you can easily 
bump package version with this method.

A user can edit a file if the default is not OK.

Best Regards
Ulf Samuelsson