R: [PATCH] cmake: switch ccache handling to use cmake's launcher

[ansuelsmth at gmail.com]

> A recent cmake version bump broke ccache handling of cmake files. This
> commit switches it to use CMAKE_X_COMPILER_LAUNCHER instead of the
> hacky ARG1 stuff.
> 
> Originally posted by Hirokazu Morikawa as a diff:
> https://github.com/openwrt/openwrt/commit/bfc433efd4a0c6875a92981d1bd
> 2a5e3e60c61c6#commitcomment-45228331
> 
> Signed-off-by: Rosen Penev <rosenp at gmail.com>

Tested-by: Ansuel Smith <ansuelsmth at gmail.com>