e log: Use a EINA_LOG_LEVELS environment variable for setting log level instead of a E_LOG_LEVEL macro
e log: Use a EINA_LOG_LEVELS environment variable for setting log level instead of a E_LOG_LEVEL macro

Summary: Use a EINA_LOG_LEVELS environment variable for setting log level instead of a E_LOG_LEVEL macro

Test Plan:
run e with EINA_LOG_LEVELS=e:4 environment variable.
we can see log messages using EINA_LOG_DOM_DBG.

Reviewers: zmike, raster, devilhorns

Reviewed By: raster

CC: cedric

Differential Revision: https://phab.enlightenment.org/D885

FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,rvandegrift/e,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,rvandegrift/e,tasn/enlightenment,tizenorg/platform.upstream.enlightenment