[alacritty_terminal] Directly use bitflags 1.3.2

This is blocked on http://fxrev.dev/966705 landing first.
In order to update fuchsia's bitflags to 2.x, we need to change
alacritty to still access bitflags 1.x.

Change-Id: Ie97733058040fbb7a5b4d4a90ea0db35bb985d84
diff --git a/alacritty_terminal/BUILD.gn b/alacritty_terminal/BUILD.gn
index 246d1ca..ffecfd8 100644
--- a/alacritty_terminal/BUILD.gn
+++ b/alacritty_terminal/BUILD.gn
@@ -31,7 +31,7 @@
 
 term_deps = [
   "//third_party/rust_crates:base64",
-  "//third_party/rust_crates:bitflags",
+  "//third_party/rust_crates:bitflags-v1_3_2",
   "//third_party/rust_crates:log",
   "//third_party/rust_crates:serde",
   "//third_party/rust_crates:serde_json",