[VOL-5222] - Upgrade golang version for VOLTHA jobs

.gitreview
VERSION
----------
  o post-release tasks.  Repository tagged and banched.
  o Add missing newlines at EOF.
  o go.mod syntax does not allow *-dev suffix so update
    master VERSION from v5.5.0-dev to v5.5.0.  Community
    can introduce a dev version when needed.

go/*.pb.og
vendor/*.go
-----------
  o invoke make mod-update to regenerate go.sum and friends.
  o lint clenaups: find . -name '*.go' -print | xargs -n1 gofmt -s -e -w

Change-Id: I3da80c0ce5600679b388e309bfa4702f1ec3212b
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux_ppc.go b/vendor/golang.org/x/sys/unix/syscall_linux_ppc.go
index 7e65e08..80897b0 100644
--- a/vendor/golang.org/x/sys/unix/syscall_linux_ppc.go
+++ b/vendor/golang.org/x/sys/unix/syscall_linux_ppc.go
@@ -3,8 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build linux && ppc
-// +build linux
-// +build ppc
+// +build linux,ppc
 
 package unix