autotools.bbclass: Order CONFIG_SHELL before CACHED_CONFIGUREVARS
This helps in overriding CACHED_CONFIGUREVARS with wrappers to run
configure under e.g. for static analysers like scan-build from clang,
while it should not change the functionality in normal case.
Since CONFIG_SHELL was introduced, it silently broke this use case and
failed running static analyser on autotool based recipes
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
