.gitignore: Add `subprojects` directory, fix some patterns.
diff --git a/.gitignore b/.gitignore
index 6dca26b..6e9fd98 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
-build
-config.mk
+/build/
+/config.mk
 include/dlg/
 src/dlg/dlg.c
+subprojects/*
+!subprojects/*.wrap