runtime: include inlined calls in result of CallersFrames

Change-Id: If1a3396175f2afa607d56efd1444181334a9ae3e
Reviewed-on: https://go-review.googlesource.com/37862
Reviewed-by: Austin Clements <austin@google.com>
diff --git a/src/runtime/traceback.go b/src/runtime/traceback.go
index 35a14f7..682e490 100644
--- a/src/runtime/traceback.go
+++ b/src/runtime/traceback.go
@@ -52,6 +52,7 @@
 	systemstack_switchPC uintptr
 	systemstackPC        uintptr
 	cgocallback_gofuncPC uintptr
+	skipPC               uintptr
 
 	gogoPC uintptr
 
@@ -78,6 +79,7 @@
 	systemstack_switchPC = funcPC(systemstack_switch)
 	systemstackPC = funcPC(systemstack)
 	cgocallback_gofuncPC = funcPC(cgocallback_gofunc)
+	skipPC = funcPC(skipPleaseUseCallersFrames)
 
 	// used by sigprof handler
 	gogoPC = funcPC(gogo)