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/meson.build b/gen/xyz/openbmc_project/meson.build
index 9921fec..72ce0bc 100644
--- a/gen/xyz/openbmc_project/meson.build
+++ b/gen/xyz/openbmc_project/meson.build
@@ -4,6 +4,7 @@
     'xyz/openbmc_project/Association__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/Association.interface.yaml',  ],
     output: [ 'Association.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -19,6 +20,7 @@
     'xyz/openbmc_project/Certs__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/Certs.errors.yaml',  ],
     output: [ 'Certs.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -36,6 +38,7 @@
     'xyz/openbmc_project/Common__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/Common.errors.yaml',  ],
     output: [ 'Common.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -53,6 +56,7 @@
     'xyz/openbmc_project/HardwareIsolation__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/HardwareIsolation.errors.yaml',  ],
     output: [ 'HardwareIsolation.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -67,6 +71,7 @@
     'xyz/openbmc_project/Inventory__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/Inventory.errors.yaml',  ],
     output: [ 'Inventory.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -89,6 +94,7 @@
     'xyz/openbmc_project/ObjectMapper__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/ObjectMapper.interface.yaml',  ],
     output: [ 'ObjectMapper.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -105,6 +111,7 @@
     'xyz/openbmc_project/ScheduledTime__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/ScheduledTime.errors.yaml',  ],
     output: [ 'ScheduledTime.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),
@@ -124,6 +131,7 @@
     'xyz/openbmc_project/Time__markdown'.underscorify(),
     input: [ '../../../yaml/xyz/openbmc_project/Time.errors.yaml',  ],
     output: [ 'Time.md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),