linux-2.6.34: add unwinding to om-gta01's defconfig

linux-2.6.34: add unwinding to om-gta01's defconfig

* taken from om-gta02 change 1516588acd3c4b4dd4add71d06ab8ce0d1bafa02

Adding unwinding remove CONFIG_FRAME_POINTER while preserving its
  debug functionalities at the cost of a bigger image
  (that we mitigate by using LZMA compression instead of gzip)
Pratically speaking that should result in speed improvements:
  Speed seem to be faster but was not tested scientifically.

Here's the unwinding help:
  This option enables stack unwinding support in the kernel
  using the information automatically generated by the
  compiler. The resulting kernel image is slightly bigger but
  the performance is not affected. Currently, this feature
  only works with EABI compilers. If unsure say Y.
And the frame pointer help:
  If you say N here, the resulting kernel will be slightly smaller and
  faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
  when a problem occurs with the kernel, the information that is
  reported is severely limited.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Acked-by: Klaus Kurzmann <mok@fluxnetz.de>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>