Build the general tests host shared libs.

Build general-tests-shared-libs as it's an expected output of building
general-tests.

Test: BUILD_NUMBER="P0" ./build/make/ci/build_test_suites --target_product aosp_x86_64
--target_release trunk_staging --with_dexpreopt_boot_img_and_system_server_only --dist_dir <dist_dir> --change_info <change_info_file> <extra_targets>
Bug: 314171817

Change-Id: I2c18f41079d6db8621299734398b7a9df64930db

ci/build_test_suites.py

@@ -80,6 +80,9 @@ def build_affected_modules(args: argparse.Namespace):
   # Call the build command with everything.
   build_command = base_build_command(args)
   build_command.extend(modules_to_build)
+  # When not building general-tests we also have to build the general tests
+  # shared libs.
+  build_command.append('general-tests-shared-libs')
 
   run_command(build_command, print_output=True)