spec/expression.dd: Move ( Type ) . Identifier to PrimaryExpression

Addresses the following irregularity in the grammar:

auto i = int.init.max;   // valid
auto j = (int).init;     // valid
auto k = (int).init.max; // invalid

UnaryExpression cannot chain into further PrimaryExpression or
PostfixExpression.

Author: CyberShadow

spec/expression.dd

@@ -874,8 +874,6 @@ $(GNAME UnaryExpression):
     $(D +) $(GSELF UnaryExpression)
     $(D !) $(GSELF UnaryExpression)
     $(GLINK ComplementExpression)
-    $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN) .) $(IDENTIFIER)
-    $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN) .) $(GLINK2 template, TemplateInstance)
     $(GLINK DeleteExpression)
     $(GLINK CastExpression)
     $(GLINK PowExpression)
@@ -1372,6 +1370,8 @@ $(GNAME PrimaryExpression):
     $(GLINK ImportExpression)
     $(GLINK NewExpression)
     $(GLINK2 type, FundamentalType) $(D .) $(IDENTIFIER)
+    $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN) .) $(IDENTIFIER)
+    $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN) .) $(GLINK2 template, TemplateInstance)
     $(GLINK2 type, FundamentalType) $(D $(LPAREN)) $(GLINK ArgumentList)$(OPT) $(D $(RPAREN))
     $(GLINK2 type, TypeCtor) $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN)) $(D .) $(IDENTIFIER)
     $(GLINK2 type, TypeCtor) $(D $(LPAREN)) $(GLINK2 type, Type) $(D $(RPAREN)) $(D $(LPAREN)) $(GLINK ArgumentList)$(OPT) $(D $(RPAREN))