build: Regenerate meson for sdbus++ update

Change-Id: I6c7b9fc22d7acf593c268713b2ef837ab983b956
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/gen/org/open_power/Control/meson.build b/gen/org/open_power/Control/meson.build
index 4a3a327..4e546fc 100644
--- a/gen/org/open_power/Control/meson.build
+++ b/gen/org/open_power/Control/meson.build
@@ -2,16 +2,15 @@
 subdir('Host')
 generated_others += custom_target(
     'org/open_power/Control/Host__markdown'.underscorify(),
-    input: [ meson.project_source_root() / 'org/open_power/Control/Host.interface.yaml',  ],
+    input: [ '../../../../org/open_power/Control/Host.interface.yaml',  ],
     output: [ 'Host.md' ],
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
         '--tool', sdbusplusplus_prog,
-        '--directory', meson.project_source_root(),
+        '--directory', meson.current_source_dir() / '../../../..',
         'org/open_power/Control/Host',
     ],
-    build_by_default: true,
 )
 
 subdir('TPM')