[dev.typeparams] cmd/compile: move def of comparable to end of predeclared slices

This avoids changing the export ABI.

Change-Id: I58950c1f4c21859d91d66d352b88e8c0972b5b8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/333164
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>

src/cmd/compile/internal/importer/support.go

@@ -101,8 +101,6 @@ var predeclared = []types2.Type{
 
 	// error
 	types2.Universe.Lookup("error").Type(),
-	// comparable
-	types2.Universe.Lookup("comparable").Type(),
 
 	// untyped types
 	types2.Typ[types2.UntypedBool],
@@ -121,6 +119,9 @@ var predeclared = []types2.Type{
 
 	// used internally by gc; never used by this package or in .a files
 	anyType{},
+
+	// comparable
+	types2.Universe.Lookup("comparable").Type(),
 }
 
 type anyType struct{}

src/cmd/compile/internal/typecheck/bexport.go

@@ -78,8 +78,6 @@ func predeclared() []*types.Type {
 
 			// error
 			types.ErrorType,
-			// comparable
-			types.ComparableType,
 
 			// untyped types
 			types.UntypedBool,
@@ -98,6 +96,9 @@ func predeclared() []*types.Type {
 
 			// any type, for builtin export data
 			types.Types[types.TANY],
+
+			// comparable
+			types.ComparableType,
 		}
 	}
 	return predecl

src/go/internal/gcimporter/support.go

@@ -104,8 +104,6 @@ var predeclared = []types.Type{
 
 	// error
 	types.Universe.Lookup("error").Type(),
-	// comparable
-	types.Universe.Lookup("comparable").Type(),
 
 	// untyped types
 	types.Typ[types.UntypedBool],
@@ -124,6 +122,9 @@ var predeclared = []types.Type{
 
 	// used internally by gc; never used by this package or in .a files
 	anyType{},
+
+	// comparable
+	types.Universe.Lookup("comparable").Type(),
 }
 
 type anyType struct{}