Move constraints out of build

Differential Revision: D71267118

Pull Request resolved: #9320

Author: jathu

runtime/kernel/targets.bzl

@@ -7,9 +7,9 @@ def _operator_registry_preprocessor_flags():
     elif not runtime.is_oss:
         return select({
             "DEFAULT": [],
-            "fbsource//xplat/executorch/build/constraints:executorch-max-kernel-num-256": ["-DMAX_KERNEL_NUM=256"],
-            "fbsource//xplat/executorch/build/constraints:executorch-max-kernel-num-128": ["-DMAX_KERNEL_NUM=128"],
-            "fbsource//xplat/executorch/build/constraints:executorch-max-kernel-num-64": ["-DMAX_KERNEL_NUM=64"],
+            "fbsource//xplat/executorch/tools/buck/constraints:executorch-max-kernel-num-256": ["-DMAX_KERNEL_NUM=256"],
+            "fbsource//xplat/executorch/tools/buck/constraints:executorch-max-kernel-num-128": ["-DMAX_KERNEL_NUM=128"],
+            "fbsource//xplat/executorch/tools/buck/constraints:executorch-max-kernel-num-64": ["-DMAX_KERNEL_NUM=64"],
         })
     else:
         return []