vendor latest containers/common

We had a couple of regressions in containers/common in the last release.
Before cutting a new release, let's vendor it here.  Since 3.0 has been
branched, we can vendor a non-release commit of c/common.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/containers/common/pkg/report/doc.go

@@ -38,7 +38,17 @@ Helpers:
 		... process JSON and output
 	}
 
-and
+Template Functions:
+
+The following template functions are added to the template when parsed:
+	- join  strings.Join, {{join .Field separator}}
+	- lower strings.ToLower {{ .Field | lower }}
+	- split strings.Split {{ .Field | split }}
+	- title strings.Title {{ .Field | title }}
+	- upper strings.ToUpper {{ .Field | upper }}
+
+report.Funcs() may be used to add additional template functions.
+Adding an existing function will replace that function for the life of that template.
 
 
 Note: Your code should not ignore errors