Don't rebuild the NOTICE files when building with mm, mmm, etc.
diff --git a/core/Makefile b/core/Makefile
index d4f9e18..9532ef2 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -436,7 +436,11 @@
installed_notice_html_gz := $(TARGET_OUT)/etc/NOTICE.html.gz
$(installed_notice_html_gz): $(target_notice_file_html_gz) | $(ACP)
$(copy-file-to-target)
+
+# if we've been run my mm, mmm, etc, don't reinstall this every time
+ifeq ($(ONE_SHOT_MAKEFILE),)
ALL_DEFAULT_INSTALLED_MODULES += $(installed_notice_html_gz)
+endif
# The kernel isn't really a module, so to get its module file in there, we
# make the target NOTICE files depend on this particular file too, which will