[HLSCustomOp] also emit pragmas for npysim codegen

src/finn/custom_op/fpgadataflow/__init__.py

@@ -166,6 +166,7 @@ class HLSCustomOp(CustomOp):
         self.defines("npysim")
         self.read_npy_data()
         self.strm_decl()
+        self.pragmas()
         self.docompute()
         self.dataoutstrm()
         self.save_as_npy()

src/finn/custom_op/fpgadataflow/templates.py

@@ -42,6 +42,7 @@ $GLOBALS$
 $DEFINES$
 
 int main(){
+$PRAGMAS$
 
 $STREAMDECLARATIONS$