s/simulator/run_command/

Having two board description nodes at the same level, one called
simulator and one called simulation is error prone and will cause people
to be confused.

The simulator node is also now poorly named.  On Sonata, for example, it
doesn't run a simulation, it loads onto the board.  The same will likely
happen with ASICs.

Given that it's both ambiguous and just plain wrong, replace it with
run_command.

The xmake still works with simulator, if someone has an out-of-tree
board file.  This will go away at some point.

sdk/boards/ibex-arty-a7-100.patch

diff --git a/sdk/boards/ibex-arty-a7-100.patch b/sdk/boards/ibex-arty-a7-100.patch
index 3170507..e9ccd3d 100644
--- a/sdk/boards/ibex-arty-a7-100.patch
+++ b/sdk/boards/ibex-arty-a7-100.patch
@@ -71,7 +71,7 @@
     },
     {
       "op": "remove",
-      "path": "/simulator"
+      "path": "/run_command"
     }
   ]
 }

sdk/boards/ibex-safe-simulator.json

diff --git a/sdk/boards/ibex-safe-simulator.json b/sdk/boards/ibex-safe-simulator.json
index d959cb1..cdc1920 100644
--- a/sdk/boards/ibex-safe-simulator.json
+++ b/sdk/boards/ibex-safe-simulator.json
@@ -49,5 +49,5 @@
     "revoker" : "hardware",
     "stack_high_water_mark" : true,
     "simulation": true,
-    "simulator" : "${sdk}/../scripts/run-ibex-safe-sim.sh"
+    "run_command" : "${sdk}/../scripts/run-ibex-safe-sim.sh"
 }

sdk/boards/sail.json

diff --git a/sdk/boards/sail.json b/sdk/boards/sail.json
index 95e1689..fecd0b7 100644
--- a/sdk/boards/sail.json
+++ b/sdk/boards/sail.json
@@ -38,6 +38,6 @@
     "tickrate_hz" : 10,
     "revoker" : "software",
     "stack_high_water_mark" : true,
-    "simulator" : "cheriot_sim",
+    "run_command" : "cheriot_sim",
     "simulation": true
 }

sdk/boards/sonata-0.2.json

diff --git a/sdk/boards/sonata-0.2.json b/sdk/boards/sonata-0.2.json
index 9747b93..63b6657 100644
--- a/sdk/boards/sonata-0.2.json
+++ b/sdk/boards/sonata-0.2.json
@@ -84,6 +84,6 @@
     "tickrate_hz" : 100,
     "revoker" : "software",
     "stack_high_water_mark" : true,
-    "simulator" : "${sdk}/../scripts/run-sonata.sh",
+    "run_command" : "${sdk}/../scripts/run-sonata.sh",
     "simulation": false
 }

sdk/boards/sonata-prerelease.json

diff --git a/sdk/boards/sonata-prerelease.json b/sdk/boards/sonata-prerelease.json
index 0ca82b0..115f111 100644
--- a/sdk/boards/sonata-prerelease.json
+++ b/sdk/boards/sonata-prerelease.json
@@ -103,7 +103,7 @@
     "tickrate_hz" : 100,
     "revoker" : "hardware",
     "stack_high_water_mark" : true,
-    "simulator" : "${sdk}/../scripts/run-sonata-1.0.sh",
+    "run_command" : "${sdk}/../scripts/run-sonata-1.0.sh",
     "simulation": false,
     "interrupts": [
         {

sdk/boards/sonata-simulator.patch

diff --git a/sdk/boards/sonata-simulator.patch b/sdk/boards/sonata-simulator.patch
index 650e419..142eaa5 100644
--- a/sdk/boards/sonata-simulator.patch
+++ b/sdk/boards/sonata-simulator.patch
@@ -8,7 +8,7 @@
     },
     {
       "op": "replace",
-      "path": "/simulator",
+      "path": "/run_command",
       "value": "${sdk}/../scripts/run-sonata-sim.sh"
     }
   ]

sdk/xmake.lua

diff --git a/sdk/xmake.lua b/sdk/xmake.lua
index 2ea30e5..9e8002b 100644
--- a/sdk/xmake.lua
+++ b/sdk/xmake.lua
@@ -413,10 +413,10 @@
 		import("core.project.config")
 		local boarddir, boardfile = board_file_for_target(target)
 		local board = load_board_file(json, boardfile)
-		if not board.simulator then
+		if (not board.run_command) and (not board.simulator) then
 			raise("board description " .. boardfile .. " does not define a run command")
 		end
-		local simulator = board.simulator
+		local simulator = board.run_command or board.simulator
 		simulator = string.gsub(simulator, "${(%w*)}", { sdk=scriptdir, board=boarddir })
 		local firmware = target:targetfile()
 		local directory = path.directory(firmware)