[k8s-deployer] Add logging to determine why some files aren't getting applied

Change-Id: Iafb493e5b9a51e18524c46d69f1e209427dfdc69
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/580964
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
diff --git a/k8s-deployer/go/k8s-deployer/main.go b/k8s-deployer/go/k8s-deployer/main.go
index 5be84b7..60c78fb 100644
--- a/k8s-deployer/go/k8s-deployer/main.go
+++ b/k8s-deployer/go/k8s-deployer/main.go
@@ -119,14 +119,17 @@
 
 		// Ensure that the file matches any provided regular expressions.
 		if len(configFileRegexes) > 0 {
+			sklog.Infof("Match: %q ?", file)
 			match := false
 			for _, re := range configFileRegexes {
 				if re.MatchString(file) {
+					sklog.Infof("  Matched %q", re.String())
 					match = true
 					break
 				}
 			}
 			if !match {
+				sklog.Infof("  No match.")
 				continue
 			}
 		}