add the meson option for monitor collection freq

Add the meson option for health monitor collection frequency with a
default value of 1s.

Change-Id: I47a87c5b85eebc676239d1d3dcf90037f0bc56b1
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
diff --git a/meson.options b/meson.options
index 0fc2767..4d4bc88 100644
--- a/meson.options
+++ b/meson.options
@@ -1 +1,4 @@
 option('tests', type: 'feature', description: 'Build tests')
+
+# Variables
+option('monitor-collection-interval', type: 'integer', value: 1, description: 'The health monitor collection interval in seconds.',)