mipsevm: rename package, make available as library instead of main package

mipsevm/evm.go

-package main
+package mipsevm
 
 import (
 	"encoding/binary"

mipsevm/evm_test.go

-package main
+package mipsevm
 
 import (
 	"bytes"

mipsevm/patch.go

-package main
+package mipsevm
 
 import (
 	"bytes"

mipsevm/solutil.go

-package main
+package mipsevm
 
 import (
 	"fmt"

mipsevm/solutil_test.go

-package main
+package mipsevm
 
 import (
 	"fmt"

mipsevm/state.go

-package main
+package mipsevm
 
 import (
 	"encoding/binary"

mipsevm/state_oracle.go

-package main
+package mipsevm
 
 import (
 	"fmt"

mipsevm/state_test.go

-package main
+package mipsevm
 
 import (
 	"bytes"

mipsevm/tracer.go

-package main
+package mipsevm
 
 type MemEntry struct {
 	EffAddr  uint32

mipsevm/unicorn.go

-package main
+package mipsevm
 
 import (
 	"fmt"

mipsevm/unicorn_test.go

-package main
+package mipsevm
 
 import (
 	"testing"