Update hcsshim tag to v0.10.0-rc.4

Signed-off-by: Kirtana Ashok <Kirtana.Ashok@microsoft.com>

vendor/github.com/Microsoft/hcsshim/internal/winapi/utils.go

@@ -34,7 +34,7 @@ type UnicodeString struct {
 // denotes the maximum number of wide chars a path can have.
 const NTSTRSAFE_UNICODE_STRING_MAX_CCH = 32767
 
-//String converts a UnicodeString to a golang string
+// String converts a UnicodeString to a golang string
 func (uni UnicodeString) String() string {
 	// UnicodeString is not guaranteed to be null terminated, therefore
 	// use the UnicodeString's Length field