log: encapsulate logger

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

src/util/log.cc

@@ -0,0 +1,8 @@
+#include "log.hh"
+
+logging::Logger glogger = logging::Logger();
+
+void
+matar::set_log_level(LogLevel level) {
+    glogger.set_level(level);
+}