ANDROID: Add checkpatch target.

Running the following will run scripts/checkpatch.pl on a
patch of HEAD

  tools/bazel run //common:checkpatch

or a given Git SHA1:

  tools/bazel run //common:checkpatch -- --git_sha1 ...

For additional flags, see

  tools/bazel run //common:checkpatch -- --help

For details, see
  build/kernel/kleaf/docs/checkpatch.md
in your source tree.

Test: TH
Bug: 259995152
Change-Id: Iaad8fd69508cf9be11340166aafbb84930d4805c
Signed-off-by: Yifan Hong <elsk@google.com>

BUILD.bazel

@@ -6,6 +6,7 @@ load("//build/bazel_common_rules/dist:dist.bzl", "copy_to_dist_dir")
 load("//build/kernel/kleaf:common_kernels.bzl", "define_common_kernels")
 load(
     "//build/kernel/kleaf:kernel.bzl",
+    "checkpatch",
     "ddk_headers",
     "kernel_build",
     "kernel_images",
@@ -39,6 +40,11 @@ _GKI_X86_64_MAKE_GOALS = [
     "modules",
 ]
 
+checkpatch(
+    name = "checkpatch",
+    checkpatch_pl = "scripts/checkpatch.pl",
+)
+
 # Deprecated - Use arch specific files from below.
 write_file(
     name = "gki_system_dlkm_modules",