meson: Add configure options

Several configure options were hard-coded, make them configurable
be passing -Dxxx=xxx options.

Tested: Verify the options could be passed from command line.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Ia82958591a0d6165ee5d9e92f0fb88609266705a
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..b878b69
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,14 @@
+option('MANIFEST_FILE',
+       type: 'string',
+       value: 'MANIFEST',
+       description: 'The path of the MANIFEST file')
+
+option('SOFTWARE_OBJPATH',
+       type: 'string',
+       value: '/xyz/openbmc_project/software',
+       description: 'The software manager Dbus root')
+
+option('PSU_INVENTORY_PATH',
+       type: 'string',
+       value: '/xyz/openbmc_project/inventory/system/chassis',
+       description: 'The PSU inventory path')