lkp: make.cross: old aarch64-gcc has been removed

[Masami Hiramatsu]

Hi Fengguang,

Recently I tried to build a cross-build environment ( https://github.com/mhiramat/linux-cross ) by using your make.cross ( https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross ).
And I've found that it failed to setup cross gcc for aarch64, because it is no more provided by linaro.

Could you update the url to the newer one from linaro or use crosstool
as like as other archs?

The latest stable version (gcc-5) can be found here.
http://releases.linaro.org/components/toolchain/binaries/latest-5/

There are also gcc-6 series for development, and you can find 4.9 binaries
too. But I would like to recommend you to use stable one for testing.

Thank you,

-- 
Masami Hiramatsu <mhiramat@xxxxxxxxxx>