gen: update due to sdbusplus-gen-meson change

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I9491eb608d9c6849b3e39fe212054a3651bfb824
diff --git a/gen/xyz/openbmc_project/Time/meson.build b/gen/xyz/openbmc_project/Time/meson.build
index 26c4405..3936983 100644
--- a/gen/xyz/openbmc_project/Time/meson.build
+++ b/gen/xyz/openbmc_project/Time/meson.build
@@ -3,6 +3,7 @@
     'xyz/openbmc_project/Time__cpp'.underscorify(),
     input: [ '../../../../yaml/xyz/openbmc_project/Time.errors.yaml',  ],
     output: [ 'error.cpp', 'error.hpp',  ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'cpp',
         '--output', meson.current_build_dir(),
@@ -17,6 +18,7 @@
     'xyz/openbmc_project/Time/EpochTime__markdown'.underscorify(),
     input: [ '../../../../yaml/xyz/openbmc_project/Time/EpochTime.interface.yaml',  ],
     output: [ 'EpochTime.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -31,6 +33,7 @@
     'xyz/openbmc_project/Time/Synchronization__markdown'.underscorify(),
     input: [ '../../../../yaml/xyz/openbmc_project/Time/Synchronization.interface.yaml',  ],
     output: [ 'Synchronization.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),