meson: Add fru-device-less build configuration

Provide an option that skips building of fru-device.  fru-device remains
enabled and built by default.

Change-Id: If927861cf70aaf594844e28e993edc308138ddf2
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meson_options.txt b/meson_options.txt
index b7869f4..a9aeeda 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,3 +1,6 @@
 option(
     'tests', type: 'feature', description: 'Build tests.',
 )
+option(
+    'fru-device', type: 'boolean', description: 'Build fru-device.',
+)