Use the NativeCall repr's new get_int to avoid redundancy

Keeping the setup state in an attribute is redundant, since at the VM level we
know perfectly well, if the native call site was initialized or not. Even more
the latter may change due to repossession. Avoid any discrepancies by just
asking the VM for the state instead of keeping track of it ourselves.

lib/NativeCall.pm6

@@ -256,8 +256,6 @@ my Lock $setup-lock .= new;
 # This role is mixed in to any routine that is marked as being a
 # native call.
 our role Native[Routine $r, $libname where Str|Callable|List|IO::Path|Distribution::Resource] {
-    has int $!setup;
-    has int $!precomp-setup;
     has native_callsite $!call is box_target;
     has Mu $!rettype;
     has $!cpp-name-mangler;
@@ -270,7 +268,8 @@ our role Native[Routine $r, $libname where Str|Callable|List|IO::Path|Distributi
 
     method !setup() {
         $setup-lock.protect: {
-            return if $!setup || $*W && $*W.is_precompilation_mode && $!precomp-setup;
+            return if nqp::unbox_i($!call);
+
             # Make sure that C++ methods are treated as mangled (unless set otherwise)
             if self.package.REPR eq 'CPPStruct' and not self.does(NativeCallMangled) {
               self does NativeCallMangled[True];
@@ -309,7 +308,6 @@ our role Native[Routine $r, $libname where Str|Callable|List|IO::Path|Distributi
                     nqp::null());
             }
 
-            ($*W && $*W.is_precompilation_mode ?? $!precomp-setup !! $!setup) = $jitted ?? 2 !! 1;
         }
     }
 
@@ -573,7 +571,7 @@ our role Native[Routine $r, $libname where Str|Callable|List|IO::Path|Distributi
             or $!is-clone # Clones and original would share the invokespec but not the $!do attribute
             or $!any-optionals # the compiled code doesn't support optional parameters yet
             or $*W;    # Avoid issues with compiling specialized version during BEGIN time
-        self!setup() unless $!setup;
+        self!setup() unless nqp::unbox_i($!call);
 
         my Mu $args := nqp::getattr(nqp::decont(args), Capture, '@!list');
         self!arity-error(args) if nqp::elems($args) != $!arity;

tools/templates/NQP_REVISION

@@ -1 +1 @@
-2019.07.1-138-g393eb9687
+2019.07.1-145-g47af9d8a9