Fix log printout

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Turn -Werror to -Wno-error if E=1 is on make command line

Makes development easier when compilation doesn't stop to warnings all
the time.

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Fix python2.7 acceleration when python not installed in target

Python 2.7 requires /usr/include/python2.7/pyconfig.h to run. Makes
that file accessible in obs-rpm-build+pp mode from target when it's
only available in tools.

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>