[patch] Pure Thumb support

[Bernhard Fischer]

On Sat, Mar 22, 2008 at 02:07:48AM +0000, Paul Brook wrote:
>The attached patch adds support for compiling arm uClibc as pure Thumb code.  
>This is needed because some recent ARM codes do not implement traditional ARM 
>mode.  Specifically: 
>
>* Cortex-M1 - An extremely minimal FPGA based core that only implements 
>Thumb-1 (aka ARMv6-M).
>* Cortex-M3 - A Thumb-2 only ARMv7-M core.
>
>Most of uClibc already builds in Thumb mode, all that is left are a handful of 
>assembly bits.
>
>Tested on arm-uclinuxeabi.
>I don't have svn write access, so please apply if ok.

Applied as r21498.

Thanks!