build: Add meson

Change-Id: Ic58b2ec92c185faa5efe0f40b2bbf6e21d6ed70c
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..327ea97
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/build*/
+/subprojects/*/