*: reflow comments to 80 characters

This reformats the entire Metropolis codebase to have comments no longer
than 80 characters, implementing CR/66.

This has been done half manually, as we don't have a good integration
between commentwrap/Bazel, but that can be implemented if we decide to
go for this tool/limit.

Change-Id: If1fff0b093ef806f5dc00551c11506e8290379d0
diff --git a/metropolis/node/build/genosrelease/main.go b/metropolis/node/build/genosrelease/main.go
index e19876e..ad6e3e2 100644
--- a/metropolis/node/build/genosrelease/main.go
+++ b/metropolis/node/build/genosrelease/main.go
@@ -14,8 +14,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// genosrelease provides rudimentary support to generate os-release files following the freedesktop spec
-// (https://www.freedesktop.org/software/systemd/man/os-release.html) from arguments and stamping
+// genosrelease provides rudimentary support to generate os-release files
+// following the freedesktop spec from arguments and stamping
+//
+// https://www.freedesktop.org/software/systemd/man/os-release.html
 package main
 
 import (