To rebuild to the toolchain:

Clone the buildroot depot:
   git://git.buildroot.net/buildroot

Run make menuconfig and disable everything except building the toolchain, or
just use this as your .config in the buildroot directory

---------------------- .config ---------------------
BR2_arm=y
BR2_cortex_a9=y
BR2_ARM_ENABLE_NEON=y
BR2_ARM_FPU_VFPV3=y
BR2_KERNEL_HEADERS_3_2=y
BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
BR2_GCC_VERSION_4_9_X=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
# BR2_TARGET_GENERIC_GETTY is not set
# BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
BR2_PACKAGE_MAKE=y
# BR2_TARGET_ROOTFS_TAR is not set
----------------------------------------------------

Run 'make'  (go grab some coffee this will take awhile)


--
rm -rf *
cp -prf <path to output>
git add -A
git commit