gstwebrtc-api: Patch 'sdp' to ESM instead of CommonJS

Using non-ESM libs in some environments (e.g. Angular) can prevent some
optimizations from taking place. Doesn't hurt to change, considering ESM
seems like the current 'correct' way of building things.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/2049>

net/webrtc/gstwebrtc-api/package.json

@@ -49,12 +49,12 @@
     "typescript": "5.7.3",
     "webpack": "5.88.2",
     "webpack-cli": "5.1.4",
-    "webpack-dev-server": "4.15.1"
+    "webpack-dev-server": "4.15.1",
+    "jsdoc-tsimport-plugin": "1.0.5"
   },
   "dependencies": {
-    "jsdoc-tsimport-plugin": "1.0.5",
-    "patch-package": "8.0.0",
-    "webrtc-adapter": "8.2.3"
+    "webrtc-adapter": "8.2.3",
+    "patch-package": "8.0.0"
   },
   "scripts": {
     "check": "eslint src",

net/webrtc/gstwebrtc-api/patches/sdp+3.2.0.patch

@@ -0,0 +1,15 @@
+diff --git a/node_modules/sdp/sdp.js b/node_modules/sdp/sdp.js
+index d0e6488..007570f 100644
+--- a/node_modules/sdp/sdp.js
++++ b/node_modules/sdp/sdp.js
+@@ -796,7 +796,6 @@ SDPUtils.isValidSDP = function(blob) {
+   return true;
+ };
+ 
+-// Expose public methods.
+-if (typeof module === 'object') {
+-  module.exports = SDPUtils;
+-}
++// Expose public methods (patched for ESM)
++export default SDPUtils;
++export { SDPUtils };