Thumb patches

[Paul Brook]

> 3) The other arm #ifdef code is to support very old binutils/gcc, right?
>    That doesn't belong in a new uClibc code.

The STT_ARM_TFUNC bit are to support non-eabi targets.
Old-abi targets (or which there are still many) identify thumb functions by 
giving them STT_ARM_TFUNC. On EABI all function ssymbols have tye STT_FUNC 
and the low bit of the value is set of Thumb functions.

The comment saying this is for "old" binutils is wrong.

Paul