editorconfig: Add meson configuration

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
diff --git a/.editorconfig b/.editorconfig
index 6eb0702..06848f6 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -33,3 +33,7 @@
 
 [*.patch]
 trim_trailing_whitespace = false
+
+[meson.build,meson_options.txt]
+indent_style = space
+indent_size = 2