Revert "prevent journald from being built on ARM"

This reverts commit 6f6f10a75f8b447637e8a89d685452871899e9c0, so that we
can apply a different workaround.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> (github: nalind)

daemon/logger/journald/journald.go

@@ -1,4 +1,4 @@
-// +build linux,!arm
+// +build linux
 
 // Package journald provides the log driver for forwarding server logs
 // to endpoints that receive the systemd format.

daemon/logger/journald/journald_unsupported.go

@@ -1,4 +1,4 @@
-// +build !linux linux,arm
+// +build !linux
 
 package journald
 

daemon/logger/journald/read.go

@@ -1,4 +1,4 @@
-// +build linux,cgo,!static_build,journald,!arm
+// +build linux,cgo,!static_build,journald
 
 package journald
 

daemon/logger/journald/read_unsupported.go

@@ -1,4 +1,4 @@
-// +build !linux !cgo static_build !journald linux,arm
+// +build !linux !cgo static_build !journald
 
 package journald