configuration Error uClibc: GCC cannot build

http://lists.busybox.net/pipermail/buildroot/2009-May/027545.html

BR2_ARM_EABI=y
BR2_GNU_TARGET_SUFFIX="linux-uclibc"

Which doesn't make sense. The correct target suffix for eabi is
"linux-uclibcgnueabi". With that change the toolchain builds.