const runtime.traceEvHeapAlloc

2 uses

	runtime (current package)
		traceevent.go#L73: 	traceEvHeapAlloc          // gcController.heapLive change [timestamp, heap alloc in bytes]
		traceruntime.go#L598: 	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvHeapAlloc, traceArg(live))