Bump to mono/cecil/master@cb6c1ca (#462)

Commit dotnet/cecil@febbd652 contains an API break, altering the return
type of `AssemblyReader.ReadGenericConstraints()` from a
`Collection<TypeReference>` to a `GenericParameterConstraintCollection`:
- public Collection<TypeReference> ReadGenericConstraints (GenericParameter generic_parameter)
+ public GenericParameterConstraintCollection ReadGenericConstraints (GenericParameter generic_parameter)
Bump to mono/cecil/master@cb6c1ca and fix
`AssemblyReader.ReadGenericConstraints()` usage so that the new
`GenericParameterConstraint.ConstraintType` is used instead of
requiring that `ReadGenericConstraints()` return `TypeReference`s.

Author: steveisok

external/cecil

@@ -110,7 +110,7 @@ static bool IsParameterCompatibleWith (TypeReference a, TypeReference b)
 returntrue;
 vargpa=(GenericParameter)a;
 foreach(varcingpa.Constraints){
-if(!c.IsAssignableFrom(b))
+if(!c.ConstraintType.IsAssignableFrom(b))
 returnfalse;
 }
 returntrue;

src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/MethodDefinitionRocks.cs

@@ -72,7 +72,7 @@ public static GenericParameterDefinitionList FromMetadata (IEnumerable<GenericPa
 ret.Add(newGenericParameterDefinition(
 p.FullNameCorrected(),
 (fromainp.Constraints
-selecta.FullNameCorrected()).ToArray()));
+selecta.ConstraintType.FullNameCorrected()).ToArray()));
 }
 returnret;
 }