libgcc: corrected -nativesdk package namings.

libgcc: corrected -nativesdk package namings.

1. Corrected the -nativesdk package namings.

2. Fixed package QA warnings:
WARNING: QA Issue: non -staticdev package contains static .a library:
libgcc-nativesdk-dev path
'/work/x86_64-nativesdk-pokysdk-linux/libgcc-nativesdk-4.6.3+svnr184847-r23/packages-split/libgcc-nativesdk-dev/opt/poky/1.1+snapshot/sysroots/x86_64-pokysdk-linux/usr/lib/x86_64-pokysdk-linux/4.6.4/libgcc.a'
WARNING: QA Issue: non -staticdev package contains static .a library:
libgcc-nativesdk-dev path
'/work/x86_64-nativesdk-pokysdk-linux/libgcc-nativesdk-4.6.3+svnr184847-r23/packages-split/libgcc-nativesdk-dev/opt/poky/1.1+snapshot/sysroots/x86_64-pokysdk-linux/usr/lib/x86_64-pokysdk-linux/4.6.4/libgcc_eh.a'

Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>