[OE-core] fido backports to support SH4 + uclibc

[Andre McCurdy]

Hi Joshua,

Could you please consider backporting the following fixes to fido.
They are required in order to successfully build for SH4 + uclibc +
blacklist GPLv3.

  aa20c3d uclibc: backport upstream fix for SH4
  898e9d7 libiconv_1.11.1: merge build and packaging fixes from libiconv_1.14
  7d2da0e libiconv_1.11.1: fix LICENSE declaration, LGPL -> LGPLv2.0
  d46333d gettext_0.16.1: add -lrt and -lpthread to LDFLAGS for uclibc builds
  d95d92a gettext_0.16.1: remove obsolete uclibc specific patch

Thanks.