chore(core): update vendor header definitions

* change version format to match the new code
* change devel vendor header size - fixes #659
* add definition for QA vendor header, with production-like flags but
  devel key

THIS QA VENDOR HEADER MUST NOT BE SIGNED BY PRODUCTION KEYS

core/embed/vendorheader/vendor_qa_DO_NOT_SIGN.json

@@ -0,0 +1,18 @@
+{
+    "header_len": 4608,
+    "text": "QA ONLY, DO NOT USE!",
+    "expiry": 0,
+    "version": [0, 0],
+    "sig_m": 2,
+    "trust": {
+        "show_vendor_string": false,
+        "require_user_click": false,
+        "red_background": false,
+        "delay": 0
+    },
+    "pubkeys": [
+        "e28a8970753332bd72fef413e6b0b2ef1b4aadda7aa2c141f233712a6876b351",
+        "d4eec1869fb1b8a4e817516ad5a931557cb56805c3eb16e8f3a803d647df7869",
+        "772c8a442b7db06e166cfbc1ccbcbcde6f3eba76a4e98ef3ffc519502237d6ef"
+    ]
+}

core/embed/vendorheader/vendor_qa_DO_NOT_SIGN.toif

@@ -0,0 +1 @@
+vendor_satoshilabs.toif

core/embed/vendorheader/vendor_satoshilabs.json

@@ -2,10 +2,7 @@
     "header_len": 4608,
     "text": "SatoshiLabs",
     "expiry": 0,
-    "version": {
-        "major": 0,
-        "minor": 0
-    },
+    "version": [0, 0],
     "sig_m": 2,
     "trust": {
         "show_vendor_string": false,

core/embed/vendorheader/vendor_unsafe.json

@@ -1,11 +1,8 @@
 {
-    "header_len": 2560,
+    "header_len": 4608,
     "text": "UNSAFE, DO NOT USE!",
     "expiry": 0,
-    "version": {
-        "major": 0,
-        "minor": 0
-    },
+    "version": [0, 0],
     "sig_m": 2,
     "trust": {
         "show_vendor_string": true,