A+C: Derek Parker (individual CLA)

Generated by a+c.

R=gobot
CC=golang-codereviews
https://codereview.appspot.com/125750043
debug/dwarf: fix Reader panic on DW_TAG_unspecified_type

The linker currently produces the DWARF 3 DW_TAG_unspecified_type tag, however the Reader in debug/dwarf will panic whenever that tag is encountered.

Fixes issue 8437.

LGTM=rsc
R=golang-codereviews, bradfitz, iant, rsc
CC=golang-codereviews
https://codereview.appspot.com/117280043

Committer: Brad Fitzpatrick <bradfitz@golang.org>
codereview: preserve branch prefix in subject during hg mail

LGTM=minux
R=minux
CC=golang-codereviews
https://codereview.appspot.com/124800043
codereview: handle upload of merge

LGTM=minux
R=minux
CC=golang-codereviews
https://codereview.appspot.com/118690043