kern-tools: kconf_check: flag CONFIG options with invalid spaces

kern-tools: kconf_check: flag CONFIG options with invalid spaces

Options with spacs around = signs will be droped/ignored by the
kernel.

The audit phase can detect this and warn the user:

    % kconf_check --report -o .kernel-meta/cfg/ \
      linux-qemux86-standard-build/.config `pwd` $cfgs

     [errors (3): .kernel-meta/cfg/fragment_errors.txt
       There are errors withing the config fragments.

    % cat .kernel-meta/cfg/fragment_errors.txt
       Warning: Ignoring "CONFIG_PARAVIRTT_CLOCK =y" -- spaces around equals are invalid
       Warning: Ignoring "CONFIG_PARAVIRTTT_CLOCK = y" -- spaces around equals are invalid
       Warning: Ignoring "CONFIG_PARAVIRTTTT_CLOCK= y" -- spaces around equals are invalid

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>