cros_build_lib: rename RunCommand to run

This aligns with the new subprocess.run API.

RunCommand -> run.
SudoRunCommand -> sudo_run.
DebugRunCommand -> dbg_run.

BUG=chromium:1006587
TEST=`./run_tests` passes

Change-Id: I78ebd4e08176d7874b3d3fe537b6ceb292b0241b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1818782
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/scripts/cros_generate_sysroot.py b/scripts/cros_generate_sysroot.py
index 867f015..694033d 100644
--- a/scripts/cros_generate_sysroot.py
+++ b/scripts/cros_generate_sysroot.py
@@ -70,7 +70,7 @@
     cmd = [self.PARALLEL_EMERGE, '--board=%s' % self.options.board,
            '--usepkgonly', '--noreplace'] + list(args)
     kwargs.setdefault('extra_env', self.extra_env)
-    cros_build_lib.SudoRunCommand(cmd, **kwargs)
+    cros_build_lib.sudo_run(cmd, **kwargs)
 
   def _InstallToolchain(self):
     # Create the sysroot's config.
@@ -90,7 +90,7 @@
     else:
       for pkg in self.options.package.split():
         cmd = ['qdepends', '-q', '-C', pkg]
-        output = cros_build_lib.RunCommand(
+        output = cros_build_lib.run(
             cmd, extra_env={'ROOT': raw_sysroot}, capture_output=True).output
 
         if output.count('\n') > 1: