perfetto: use the new upstream repo

The old one was abandoned without so much as a README note.

This will also allow using newer releases than 47; the current one being
53, but this MR doesn't address that, as it aims to be a simple no-op
change.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38525>

subprojects/perfetto.wrap

@@ -1,6 +1,6 @@
 [wrap-git]
 directory = perfetto
 
-url = https://android.googlesource.com/platform/external/perfetto
+url = https://github.com/google/perfetto
 revision = v47.0
 depth = 1