fixup! Cache predicate results

To avoid predicate from being called multiple times.
This causes rspec-mocks failure:

    1) Using a partial mock on a proxy object works properly
       Failure/Error: expect(proxy).to receive(:proxied?).and_return(false)

         (#<Object:0x00007fa5f658ad10>).proxied?(*(any args))
             expected: 1 time with any arguments
             received: 3 times with any arguments
       # ./spec/rspec/mocks/partial_double_spec.rb:237:in `block (2 levels) in <module:Mocks

lib/rspec/matchers/built_in/has.rb

@@ -75,11 +75,12 @@ def predicate_matches?(value=true)
           if RSpec::Expectations.configuration.strict_predicate_matchers?
             value == predicate_result
           else
-            if value == !!predicate_result && value != predicate_result
+            predicate_actual = predicate_result
+            if value == !!predicate_actual && value != predicate_actual
               RSpec.deprecate(
-                "`#{predicate_method_name}` returned neither `true` nor `false`, but rather `#{predicate_result.inspect}`")
+                "`#{predicate_method_name}` returned neither `true` nor `false`, but rather `#{predicate_actual.inspect}`")
             end
-            value == !!predicate_result
+            value == !!predicate_actual
           end
         end