[VOL-4290] Voltha go library updates for gRPC migration

Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/github.com/coreos/bbolt/bolt_arm.go b/vendor/github.com/coreos/bbolt/bolt_arm.go
new file mode 100644
index 0000000..aee2596
--- /dev/null
+++ b/vendor/github.com/coreos/bbolt/bolt_arm.go
@@ -0,0 +1,7 @@
+package bbolt
+
+// maxMapSize represents the largest mmap size supported by Bolt.
+const maxMapSize = 0x7FFFFFFF // 2GB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0xFFFFFFF