Fix a failing test case after 6c75ab5f66b403f7ca67e86aeed3a58abe10570b

The test is the same whether it's testing _BitInt or _ExtInt, so use
the type which is not deprecated.

GitOrigin-RevId: 0ef8ad08db6c154f14c0e060b71106dacd8f29fd
diff --git a/test/Sema/builtins-elementwise-math.c b/test/Sema/builtins-elementwise-math.c
index 1825d0c..19e9c00 100644
--- a/test/Sema/builtins-elementwise-math.c
+++ b/test/Sema/builtins-elementwise-math.c
@@ -60,7 +60,7 @@
   enum f { three };
   enum f x = __builtin_elementwise_max(one, three);
 
-  _ExtInt(32) ext;
+  _BitInt(32) ext;
   ext = __builtin_elementwise_max(ext, ext);
 
   const int ci;
@@ -112,7 +112,7 @@
   enum f { three };
   enum f x = __builtin_elementwise_min(one, three);
 
-  _ExtInt(32) ext;
+  _BitInt(32) ext;
   ext = __builtin_elementwise_min(ext, ext);
 
   const int ci;