Use the better fix for the issue with reflected calls in heap profiles

This uses https://go-review.googlesource.com/#/c/33635 instead of the
previous change to fix https://github.com/google/pprof/issues/54.

profile/legacy_profile.go

 	// Preserve Go runtime frames that appear in the middle/bottom of
 	// the stack.
 	`runtime\.panic`,
-	// See https://github.com/google/pprof/issues/54.
-	`runtime\.call32`,
-	`runtime\.call64`,
+	`runtime\.reflectcall`,
+	`runtime\.call[0-9]*`,
 }, `|`)
 
 var cpuProfilerRxStr = strings.Join([]string{