build: add wrapfiles for dependencies

Update meson.build and add wrapfiles so that all dependencies
are handled as subprojects.  This allows builds completely
outside of bitbake or an SDK.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Id9e46013671d1d407b13549c29c15770c1c6fb2c
diff --git a/.gitignore b/.gitignore
index de8712e..6da54be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 build*/
-subprojects/*/
+subprojects/*
+!subprojects/*.wrap