Node numbers different on Linux to Mac

Probably unwise to have node numbers on regression test outputs.

Author: tjj2017

testsuite/gnat2goto/tests/address_clause/test.out

@@ -1,13 +1,13 @@
 Standard_Output from gnat2goto address_clause:
 N_Attribute_Definition_Clause "address" (Node_Id=2277) (source,analyzed)
- Sloc = 12399  address_clause.adb:5:4
+ Sloc = 8303  address_clause.adb:5:4
  Chars = "address" (Name_Id=300000791)
  Name = N_Identifier "var_addr_1" (Node_Id=2274)
  Expression = N_Function_Call (Node_Id=2280)
  Entity = N_Defining_Identifier "var_addr_1" (Entity_Id=2264)
  Check_Address_Alignment = True
 N_Attribute_Definition_Clause "address" (Node_Id=2295) (source,analyzed)
- Sloc = 12483  address_clause.adb:8:4
+ Sloc = 8387  address_clause.adb:8:4
  Chars = "address" (Name_Id=300000791)
  Name = N_Identifier "var_addr_2" (Node_Id=2292)
  Expression = N_Function_Call (Node_Id=2302)