RescueOS v1.1 included syntax highlighting definitions for nano. Patch buildroot's nano package to have it install these files from nano's source.
Arrange for the inclusion of wl1252 firmware in the rootfs. Patch buildroot to extract the desired files from linux-firmware.
This GCC patch was needed in order to successfully build a cross-compilation toolchain under buildroot on Ubuntu 14.04. The patch is included in later GCC releases, so we probably can drop this once we upgrade GCC.