icu: fix usage of libicudata on ARM EABIhf

The libicudata library was linked as a "data only" library using the
-nostdlib -nodefaultlibs flags, but this causes problems when using
the library on ARM EABIhf systems. Removing those flags fixes the
problem, and is the solution used by Debian, see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=653457

 for all the
details.

[Thomas: fix commit log and title, add more details to the patch
description.]

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@devialet.com>
Cc: Thomas Petazzoni  <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>