[VOL-4291] Rw-core updates for gRPC migration

Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/bbolt/bolt_ppc64.go b/vendor/github.com/coreos/bbolt/bolt_ppc64.go
new file mode 100644
index 0000000..a761209
--- /dev/null
+++ b/vendor/github.com/coreos/bbolt/bolt_ppc64.go
@@ -0,0 +1,9 @@
+// +build ppc64
+
+package bbolt
+
+// maxMapSize represents the largest mmap size supported by Bolt.
+const maxMapSize = 0xFFFFFFFFFFFF // 256TB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0x7FFFFFFF