[PATCH][PING] Pretty-printing plt entries on ARM (second try)

[Yury Gribov]

Nicholas Clifton wrote:
>> Or should I use some special triplet?
>
> Yes try building a toolchain configure with:
>    --target=arm-eabi --with-cpu=cortex-m3
> and then run the testsuite with -mthumb specified on the command line.

Ok, I see no regressions after compiling for cortex-m3 and forcedly 
setting ASFLAGS to -mthumb in default.exp.
Still not sure that's enough: many assembler tests failed to compile 
under -mthumb because they were written for ARM ISA.
Let me know if you run into any regressions.

And thanks for commiting the patch!

-Y