Mutex profiling, syscall, fmt, go/types, html/template.

TBR=See https://golang.org/cl/33244

Updates #17929

Change-Id: I1ba0649171d6f6a69646a90eb65db6674cb903af
Reviewed-on: https://go-review.googlesource.com/33684Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>