manually encode newlines on all printed commands

This way we group key value arguments: e.g.:

    make \
    -j 8 \
    all

instead of:

    make \
    -j \
    8 \
    all

and reach CLI nirvana, while also subtly breaking several commands due to
lack of testing.

build-modules

@@ -3,7 +3,6 @@
 import distutils.dir_util
 import os
 import platform
-import shlex
 import shutil
 
 import common
@@ -90,16 +89,16 @@ Use the host packaged cross toolchain.
         common.run_cmd(
             (
                 [
-                    'make',
-                    '-j', str(args.nproc),
-                    'ARCH={}'.format(common.linux_arch),
-                    'CC={}'.format(cc),
-                    'CROSS_COMPILE={}'.format(prefix),
-                    'LINUX_DIR={}'.format(linux_dir),
-                    'M={}'.format(build_subdir),
-                    'OBJECT_FILES={}'.format(' '.join(object_files)),
+                    'make', common.Newline,
+                    '-j', str(args.nproc), common.Newline,
+                    'ARCH={}'.format(common.linux_arch), common.Newline,
+                    'CC={}'.format(cc), common.Newline,
+                    'CROSS_COMPILE={}'.format(prefix), common.Newline,
+                    'LINUX_DIR={}'.format(linux_dir), common.Newline,
+                    'M={}'.format(build_subdir), common.Newline,
+                    'OBJECT_FILES={}'.format(' '.join(object_files)), common.Newline,
                 ] +
-                shlex.split(args.make_args) +
+                common.shlex_split(args.make_args) +
                 verbose
             ),
             cwd=os.path.join(common.kernel_modules_build_subdir),