Move platform constraints to bazel_common_rules.

This enables sharing of platform constraints between platform and kernel builds.

Bug: 304594734

Test: treehugger
Change-Id: I48091eeaf2e529c3f180ba056da3935911868b14
diff --git a/bp2build/cc_prebuilt_library_static_test.go b/bp2build/cc_prebuilt_library_static_test.go
index 17da813..7d0ab28 100644
--- a/bp2build/cc_prebuilt_library_static_test.go
+++ b/bp2build/cc_prebuilt_library_static_test.go
@@ -69,15 +69,15 @@
 			ExpectedBazelTargets: []string{
 				MakeBazelTarget("cc_prebuilt_library_static", "libtest", AttrNameToString{
 					"static_library": `select({
-        "//build/bazel/platforms/arch:arm": "libg.so",
-        "//build/bazel/platforms/arch:arm64": "libf.so",
+        "//build/bazel_common_rules/platforms/arch:arm": "libg.so",
+        "//build/bazel_common_rules/platforms/arch:arm64": "libf.so",
         "//conditions:default": None,
     })`}),
 				MakeBazelTarget("cc_prebuilt_library_static", "libtest_alwayslink", AttrNameToString{
 					"alwayslink": "True",
 					"static_library": `select({
-        "//build/bazel/platforms/arch:arm": "libg.so",
-        "//build/bazel/platforms/arch:arm64": "libf.so",
+        "//build/bazel_common_rules/platforms/arch:arm": "libg.so",
+        "//build/bazel_common_rules/platforms/arch:arm64": "libf.so",
         "//conditions:default": None,
     })`}),
 			},