* correct symbol table size
* do not reorder functions in output
* traceback
* signal handling
* use same code for go + defer
* handle leaf functions in symbol table
R=kaib, dpx
CC=golang-dev
https://golang.org/cl/884041
go/test: passes 64% (215/337) tests
metric updated, had total number of tests wrong. number of
failing tests is down from 129 to 122.
R=rsc
APPROVED=rsc
DELTA=228 (12 added, 5 deleted, 211 changed)
OCL=34897
CL=34899