Undo accidental partial revert of D63335477

Summary:
D63653729 was originally written on a base revision before D63335477
landed. When rebasing, somehow the change to libsqlite3-sys fixups got undone.

Reviewed By: christolliday

Differential Revision: D63918825

fbshipit-source-id: 7857d0fcd2f7b83416cc6dc3d8b5c3788b0c4d62

shim/third-party/rust/fixups/libsqlite3-sys/fixups.toml

@@ -2,10 +2,7 @@
 # We can't easily import bindgen because of its libclang dependency,
 # so in the meantime we need to use pre-generated bindgen files.
 
-extra_mapped_srcs = {"sqlite3/bindgen_bundled_version.rs" = "src/bindgen.rs"}
-
-[env]
-OUT_DIR = "."
+env = { "OUT_DIR" = "$(location //third-party/rust/fixups/libsqlite3-sys:out_dir)" }
 
 [[buildscript]]
 [buildscript.cxx_library]