cmd/link: enable DWARF compression on Windows
cmd/link: enable DWARF compression on Windows

Simple follow-on to CL 118276. Everything worked except that the
compressed sections need to be aligned at PEFILEALIGN.

Fixes #25927
Updates #11799

Change-Id: Iec871defe30e3e66055d64a5ae77d5a7aca355f5
Reviewed-on: https://go-review.googlesource.com/119816
Run-TryBot: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Reviewed-by: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>

nawawi/go,akutz/go,golang/go,akutz/go,josharian/go,josharian/go,cloudflare/go,akutz/go,cloudflare/go,CAFxX/go,CAFxX/go,josharian/go,akutz/go,josharian/go,CAFxX/go,CAFxX/go,golang/go,golang/go,josharian/go,nawawi/go,cloudflare/go,akutz/go,nawawi/go,golang/go,golang/go,cloudflare/go,nawawi/go,CAFxX/go,cloudflare/go,josharian/go,josharian/go,josharian/go,golang/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,akutz/go,cloudflare/go,cloudflare/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,akutz/go,akutz/go,cloudflare/go,CAFxX/go