Add unified, minimal logging API
Moving src/intel/common/intel_log minimal logging API approach to src/util/u_log. It writes to syslog on Android (because stderr usually goes to /dev/null there) and to stderr on other (non-Android) devices.
Moving src/intel/common/intel_log minimal logging API approach to src/util/u_log. It writes to syslog on Android (because stderr usually goes to /dev/null there) and to stderr on other (non-Android) devices.