build: additional cmake/meson cleanups

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If95d5556a8b0e2f7fa13c338c2fc07e1bad4951b
diff --git a/.gitignore b/.gitignore
index 3ba4350..6da54be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
-# Meson
-/build*/
-/subprojects/*/
+build*/
+subprojects/*
+!subprojects/*.wrap