meson: Add lmsensors support

v2: - Make -Dlmsensors=false work
    - Simplify auto and true cases

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

meson_options.txt

@@ -157,6 +157,13 @@ option(
   choices : ['auto', 'true', 'false'],
   description : 'Use libunwind for stack-traces'
 )
+option(
+  'lmsensors',
+  type : 'combo',
+  value : 'auto',
+  choices : ['auto', 'true', 'false'],
+  description : 'Enable HUD lmsensors support.'
+)
 option(
   'build-tests',
   type : 'boolean',