Update vendored go-spew to fix crash on OS X.

https://github.com/AlekSi/0xb01dfacedebac1e
https://github.com/golang/go/issues/14631

Godeps/Godeps.json

@@ -7,7 +7,7 @@
 	"Deps": [
 		{
 			"ImportPath": "github.com/davecgh/go-spew/spew",
-			"Rev": "2df174808ee097f90d259e432cc04442cf60be21"
+			"Rev": "5215b55f46b2b919f50a1df0eaa5886afe4e3b3d"
 		},
 		{
 			"ImportPath": "github.com/pmezard/go-difflib/difflib",

vendor/github.com/davecgh/go-spew/spew/bypass.go

@@ -91,6 +91,21 @@ func init() {
 		flagKindShift = 0
 		flagRO = 1 << 5
 		flagIndir = 1 << 6
+
+		// Commit adf9b30e5594 modified the flags to separate the
+		// flagRO flag into two bits which specifies whether or not the
+		// field is embedded.  This causes flagIndir to move over a bit
+		// and means that flagRO is the combination of either of the
+		// original flagRO bit and the new bit.
+		//
+		// This code detects the change by extracting what used to be
+		// the indirect bit to ensure it's set.  When it's not, the flag
+		// order has been changed to the newer format, so the flags are
+		// updated accordingly.
+		if upfv&flagIndir == 0 {
+			flagRO = 3 << 5
+			flagIndir = 1 << 7
+		}
 	}
 }
 

vendor/github.com/davecgh/go-spew/spew/dump.go

@@ -181,8 +181,6 @@ func (d *dumpState) dumpSlice(v reflect.Value) {
 		// Try to use existing uint8 slices and fall back to converting
 		// and copying if that fails.
 		case vt.Kind() == reflect.Uint8:
-			// TODO(davec): Fix up the disableUnsafe bits...
-
 			// We need an addressable interface to convert the type
 			// to a byte slice.  However, the reflect package won't
 			// give us an interface on certain things like