klibc_2.0.2: apply FIX_V4BX patch for armv4 targets only

* linker fix is needed to avoid 'bx, lr' instruction on armv4
 * patch is applied only for armv4 for eabi builds
 * http://wiki.debian.org/ArmEabiPort#Choice_of_minimum_CPU

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>