rule_parser uses []byte

intern target names: share the same string as much as possible.

$ ./repo/android.sh time kati -c -kati_memstats='alloc={{.Alloc}},total={{.TotalAlloc}},sys={{.Sys}},malloc={{.Mallocs}},free={{.Frees}},heap idle={{.HeapIdle}},inuse={{.HeapInuse}},released={{.HeapReleased}},pause={{.PauseTotalNs}},numGC={{.NumGC}}'
...
alloc=686232544,total=9471977912,sys=990856408,malloc=204647708,free=200142535,heap idle=5914624,inuse=909885440,released=0,pause=10103883229,numGC=341
5 files changed