Fixed the targets of analysis manifest entries.

Before this change, all entries would use the last visited target from the
previous loop, thus would not match their parent target section.

Author: Arnavion

master/build-rust-manifest.py

@@ -412,10 +412,11 @@ def build_manifest(rustc_date, rustc_version, rustc_short_version,
         }]
 
         if channel == "nightly":
-            extensions += [{
-            "pkg": "rust-analysis",
-            "target": target,
-        }]
+            for target in target_list:
+                extensions += [{
+                    "pkg": "rust-analysis",
+                    "target": target,
+                }]
 
         # The binaries of the 'rust' package are on the local disk.
         # url_and_hash_of_rust_package will try to locate them