Update .gitignore to exclude a bunch of rbutil detritus

Change-Id: I85ee7fa590190a6236b0a270d65227926a5f5e82
diff --git a/.gitignore b/.gitignore
index a5741e2..141d156 100644
--- a/.gitignore
+++ b/.gitignore
@@ -78,10 +78,19 @@
 /rbutil/rbutilqt/*.Debug
 /rbutil/rbutilqt/*.Release
 /rbutil/rbutilqt/tags
+/rbutil/rbutilqt/.qmake.stash
 
 # /rbutil/rbutilqt/lang/
 /rbutil/rbutilqt/lang/*.qm
 
+# More rbutil
+/rbutil/*/buildposix
+/rbutil/*/uninstall_script.[ch]
+/rbutil/*/install_script.[ch]
+/rbutil/mkimxboot/mkimxboot
+/rbutil/mknwzboot/mknwzboot
+/rbutil/mkzenboot/mkzenboot
+
 # /tools/
 /tools/bdf2bmp
 /tools/sh2d