uclibc: Get uclibc working in thumb mode.

uclibc: Get uclibc working in thumb mode.

	* WARNING!! Do not use bintils 2.19 or 2.19.1
          when compiling in thumb mode. The veneer generation
          does not work as expected. Use binutils 2.18 or binutils_cvs

	* Move LEAD_SONAME into uclibc.inc

	* Use no optimizations while compiling ldso.c
	  to over come a gcc ICE

	* Use ARM mode resolver for thumb mode. The
	  resolver depends on ip register and if we
	  use thumb function for _dl_linux_resolve then
	  it adds a veneer which corrupts ip.