Migrate to Meson build

This commit focuses in enabling the meson build for the
phosphor-snmp repo.

To build and install using meson:
  meson build
  ninja -C build
  ninja -C build install

Tested By:
  meson -Dtests=enabled build
  ninja -C build test

Signed-off-by: Ratan Gupta <ratankgupta31@gmail.com>
Change-Id: I3a79a42d2fed3f39ae218f3e3f81fb165a12ea17
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..cdf492c
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1 @@
+option('tests', type: 'feature', description: 'Build tests', value: 'enabled')