Rename: primitives/sr-std -> primitives/sp-std (#4327)

* primitives/sr-std -> primitives/std

* fix

* fix conflict

* rstd -> sp-std

* git mv

* fix review

* fix merge

substrate/primitives/consensus/babe/src/digest.rs

@@ -33,7 +33,7 @@ use schnorrkel::{
 	SignatureError, errors::MultiSignatureStage,
 	vrf::{VRFProof, VRFOutput, VRF_OUTPUT_LENGTH, VRF_PROOF_LENGTH}
 };
-use rstd::vec::Vec;
+use sp_std::vec::Vec;
 
 
 /// A BABE pre-runtime digest. This contains all data required to validate a

substrate/primitives/consensus/babe/src/inherents.rs

@@ -23,7 +23,7 @@ use sp_timestamp::TimestampInherentData;
 
 #[cfg(feature = "std")]
 use codec::Decode;
-use rstd::result::Result;
+use sp_std::result::Result;
 
 /// The BABE inherent identifier.
 pub const INHERENT_IDENTIFIER: InherentIdentifier = *b"babeslot";

substrate/primitives/consensus/babe/src/lib.rs

@@ -23,7 +23,7 @@ mod digest;
 pub mod inherents;
 
 use codec::{Encode, Decode};
-use rstd::vec::Vec;
+use sp_std::vec::Vec;
 use sp_runtime::{ConsensusEngineId, RuntimeDebug};
 
 #[cfg(feature = "std")]