Move/add %immutable in their files and before they are used

Makes all those files more self-contained.

bindings/amplifier.swg

@@ -23,6 +23,11 @@
 #include <hamlib/amplifier.h>
 %}
 
+%immutable amp_caps::model_name;
+%immutable amp_caps::mfg_name;
+%immutable amp_caps::version;
+%immutable amp_caps::copyright;
+
 %include <hamlib/amplist.h>
 %include <hamlib/amplifier.h>
 

bindings/hamlib.swg

@@ -202,21 +202,12 @@
 %immutable confparams::tooltip;
 %immutable confparams::dflt;
 %immutable cs;
-%immutable rig_caps::model_name;
-%immutable rig_caps::mfg_name;
-%immutable rig_caps::version;
-%immutable rig_caps::copyright;
 %immutable hamlib_version2;
 %immutable hamlib_copyright2;
 
 %immutable clone_combo_set;
 %immutable clone_combo_get;
 
-%immutable rot_caps::model_name;
-%immutable rot_caps::mfg_name;
-%immutable rot_caps::version;
-%immutable rot_caps::copyright;
-
 %include <hamlib/rig_dll.h>
 
 %inline {

bindings/rig.swg

@@ -22,6 +22,11 @@
 #include <hamlib/rig.h>
 %}
 
+%immutable rig_caps::model_name;
+%immutable rig_caps::mfg_name;
+%immutable rig_caps::version;
+%immutable rig_caps::copyright;
+
 %include <hamlib/riglist.h>
 %include <hamlib/rig.h>
 

bindings/rotator.swg

@@ -22,6 +22,11 @@
 #include <hamlib/rotator.h>
 %}
 
+%immutable rot_caps::model_name;
+%immutable rot_caps::mfg_name;
+%immutable rot_caps::version;
+%immutable rot_caps::copyright;
+
 %include <hamlib/rotator.h>
 %include <hamlib/rotlist.h>