Replace outdated select() on --cpu with platform API equivalent.

PiperOrigin-RevId: 700372326
Change-Id: Ia8f82d9dc4cd32f905cb803fd3ed643f356e4b27

absl/BUILD.bazel

diff --git a/absl/BUILD.bazel b/absl/BUILD.bazel
index 253c0ae..ba1691f 100644
--- a/absl/BUILD.bazel
+++ b/absl/BUILD.bazel
@@ -84,25 +84,9 @@
 
 config_setting(
     name = "ppc",
-    values = {
-        "cpu": "ppc",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "cpu_wasm",
-    values = {
-        "cpu": "wasm",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "cpu_wasm32",
-    values = {
-        "cpu": "wasm32",
-    },
+    constraint_values = [
+        "@platforms//cpu:ppc",
+    ],
     visibility = [":__subpackages__"],
 )
 
@@ -125,8 +109,6 @@
 selects.config_setting_group(
     name = "wasm",
     match_any = [
-        ":cpu_wasm",
-        ":cpu_wasm32",
         ":platforms_wasm32",
         ":platforms_wasm64",
     ],
@@ -135,9 +117,9 @@
 
 config_setting(
     name = "fuchsia",
-    values = {
-        "cpu": "fuchsia",
-    },
+    constraint_values = [
+        "@platforms//os:fuchsia",
+    ],
     visibility = [":__subpackages__"],
 )