renderer: use direct FreeType with explicit font files

bench.sh

@@ -22,14 +22,14 @@ cleanup()
 
 trap cleanup 0 1 2 15
 
-./strans map font &
+./strans map "$@" &
 strans_pid=$!
 sleep 1
 kill -0 "$strans_pid"
 
-# warm up glyph cache
+# warm up the renderer
 ./bench/bench bench/bench.keys 100
-echo "cache warmed up"
+echo "renderer warmed up"
 
 perf record -g -o bench/perf.data -p "$strans_pid" &
 perf_pid=$!