add meson build

most the other openbmc projects are turning into meson projects, so
let's hop on that meson train.

Tested: Builds as expected

Change-Id: I06b6f9e28e27bf7922f42f93756efb98bdb40b2a
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/subprojects/sdeventplus.wrap b/subprojects/sdeventplus.wrap
new file mode 100644
index 0000000..7503664
--- /dev/null
+++ b/subprojects/sdeventplus.wrap
@@ -0,0 +1,3 @@
+[wrap-git]
+url = https://github.com/openbmc/sdeventplus
+revision = HEAD