move all builds to components

build-linux

@@ -81,7 +81,7 @@ class LinuxComponent(common.Component):
 
     def get_argparse_args(self):
         return {
-                'description': '''\
+            'description': '''\
 Build the Linux kernel.
 '''
         }
@@ -89,4 +89,5 @@ Build the Linux kernel.
     def get_build_dir(self, args):
         return common.linux_build_dir
 
-LinuxComponent().build()
+if __name__ == '__main__':
+    LinuxComponent().build()