[PATCH 1/4][MSP430] Add feature to add lower/either/upper prefixes to section names

[Jozef Lawrynowicz <jozef dot l at somniumtech dot com>]

This patch adds a feature to the linker which adds a lower/either/upper
prefix to code/data sections, depending on the option passed to --code-
region or --data-region. GCC propagates the parameters passed to -mcode-
region and -mdata-region to these linker options. The benefit of this
feature is that precompiled objects or libraries can now be shuffled
around by the linker placement algorithm. For example, simple C++
programs do not build for some devices with small ROM/RAM. Previously,
C++ libraries would take up many kB and would all be placed in lower
memory, but when the sections from the libraries are shuffled between
the regions there is enough space available to successfully link these
programs.

The added tests pass when built with todays GCC trunk and binutils master.

Attachment: 0001-MSP430-Add-feature-to-add-lower-either-upper-prefixe.patch
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