Strengthen SA-10, add point defense.

Fixes https://github.com/Khopa/dcs_liberation/issues/417, though the
notes on that bug about this being non-optimal for skynet are still
true. This doesn't make skynet behavior any worse though, and does
improve it some compared to not having PD.

Adds two new SA-10 generator variants:

* Tier 2, with SA-15 for point defense
* Tier 3, with SA-15 for point defense and the Shilka upgraded to a
  Tunguska.

Updated factions that are capable of those systems, added missing SAMs
to those factions, and removed use of SA-19 as an independent SAM from
those factions. Will do a larger audit of faction SAMs later.

resources/factions/china_2010.json

@@ -45,8 +45,10 @@
   ],
   "sams": [
     "HQ7Generator",
+    "SA6Generator",
     "SA10Generator",
-    "SA6Generator"
+    "Tier2SA10Generator",
+    "SA11Generator"
   ],
   "ewrs": [
     "BoxSpringGenerator",

resources/factions/pakistan_2015.json

@@ -44,8 +44,9 @@
     "ZU23Generator"
   ],
   "sams": [
+    "SA2Generator",
     "SA10Generator",
-    "SA2Generator"
+    "SA11Generator"
   ],
   "ewrs": [
     "BoxSpringGenerator",

resources/factions/russia_2010.json

@@ -53,10 +53,12 @@
     "SA13Generator"
   ],
   "sams": [
-    "SA11Generator",
-    "SA10Generator",
     "SA6Generator",
-    "SA19Generator"
+    "SA8Generator",
+    "SA10Generator",
+    "SA11Generator",
+    "Tier2SA10Generator",
+    "Tier3SA10Generator"
   ],
   "ewrs": [
     "BoxSpringGenerator",

resources/factions/russia_2020.json

@@ -51,9 +51,11 @@
     "SA19Generator"
   ],
   "sams": [
-    "SA11Generator",
+    "SA8Generator",
     "SA10Generator",
-    "SA19Generator"
+    "SA11Generator",
+    "Tier2SA10Generator",
+    "Tier3SA10Generator"
   ],
   "ewrs": [
     "BoxSpringGenerator",

resources/factions/syria_2011.json

@@ -60,8 +60,11 @@
     "SA2Generator",
     "SA3Generator",
     "SA6Generator",
+    "SA8Generator",
     "SA10Generator",
-    "SA11Generator"
+    "SA11Generator",
+    "Tier2SA10Generator",
+    "Tier3SA10Generator"
   ],
   "ewrs": [
     "BoxSpringGenerator",

resources/factions/ukraine_2010.json

@@ -45,8 +45,12 @@
   ],
   "sams": [
     "SA3Generator",
+    "SA6Generator",
+    "SA8Generator",
     "SA10Generator",
-    "SA11Generator"
+    "SA11Generator",
+    "Tier2SA10Generator",
+    "Tier3SA10Generator"
   ],
   "ewrs": [
     "BigBirdGenerator"