Add PowerState Interface

There are many cases where a BMC would have to show the power state
of a FRU, This commit adds a generic interface for capturing the
power state of an object.

This would help map the actual power state of the FRU to redfish.
Below is the spec link :
http://redfish.dmtf.org/schemas/v1/Resource.json#/definitions/PowerState

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Iea8455ef9b03de7923104c1e29d28a201756fc7a
diff --git a/gen/xyz/openbmc_project/State/Decorator/PowerState/meson.build b/gen/xyz/openbmc_project/State/Decorator/PowerState/meson.build
new file mode 100644
index 0000000..c66acd3
--- /dev/null
+++ b/gen/xyz/openbmc_project/State/Decorator/PowerState/meson.build
@@ -0,0 +1,14 @@
+# Generated file; do not modify.
+generated_sources += custom_target(
+    'xyz/openbmc_project/State/Decorator/PowerState__cpp'.underscorify(),
+    input: [ '../../../../../../yaml/xyz/openbmc_project/State/Decorator/PowerState.interface.yaml',  ],
+    output: [ 'server.cpp', 'server.hpp', 'client.hpp',  ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'cpp',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.current_source_dir() / '../../../../../../yaml',
+        'xyz/openbmc_project/State/Decorator/PowerState',
+    ],
+)
+