Mark Xcode 13.2.1 as supported (swiftlang#40778)

MaxDesiatov · web-flow · commit 2b5857b0c93c · 2022-01-10T08:10:25.000Z
Currently, when trying to build with the latest stable Xcode, you get this error:

```
using unsupported Xcode version:

Xcode 13.2.1
Build version 13C100
```

Xcode 13.2.1 can successfully build the toolchain and should be marked as supported.
diff --git a/utils/build-script b/utils/build-script
@@ -59,7 +59,8 @@ _SUPPORTED_XCODE_BUILDS = [
     ("13.0 beta 4", "13A5201i"),
     ("13.0", "13A233"),
     ("13.1 RC 1", "13A1030d"),
-    ("13.2 beta", "13C5066c")
+    ("13.2 beta", "13C5066c"),
+    ("13.2.1", "13C100")
 ]
 
 # -----------------------------------------------------------------------------

Original file line number	Diff line number	Diff line change
`@@ -59,7 +59,8 @@ _SUPPORTED_XCODE_BUILDS = [`
`59`	`59`	`("13.0 beta 4", "13A5201i"),`
`60`	`60`	`("13.0", "13A233"),`
`61`	`61`	`("13.1 RC 1", "13A1030d"),`
`62`		`- ("13.2 beta", "13C5066c")`
	`62`	`+ ("13.2 beta", "13C5066c"),`
	`63`	`+ ("13.2.1", "13C100")`
`63`	`64`	`]`
`64`	`65`
`65`	`66`	`# -----------------------------------------------------------------------------`