`make clean` removes committed files

[ingydotnet]

From a fresh clone:

miniMAL $ make clean && git status
----------------------------------------------
Running: make --no-print-directory -C js clean
rm -f *-uglify.js *-uglify-pretty.js *-regpack.js miniMAL-js1k.b64 miniMAL-node.js miniMAL-core.js web/miniMAL-js1k.js web/miniMAL-min.js web/miniMAL-core.js
----------------------------------------------
Running: make --no-print-directory -C python clean
rm -f *-minipy.py *.pyz miniMAL.py miniMAL.pyz
----------------------------------------------
Running: make --no-print-directory -C cljs clean
rm -f src-min/miniMAL/step0_repl.cljc src-min/miniMAL/step1_read_print.cljc src-min/miniMAL/step2_eval.cljc src-min/miniMAL/step3_env.cljc src-min/miniMAL/step4_if_fn_do.cljc src-min/miniMAL/step5_tco.cljc src-min/miniMAL/step6_file.cljc src-min/miniMAL/step7_interop.cljc src-min/miniMAL/step8_macros.cljc src-min/miniMAL/step9_try.cljc src-min/miniMAL/stepA_miniMAL.cljc miniMAL
rm -f build/step0_repl.js build/step1_read_print.js build/step2_eval.js build/step3_env.js build/step4_if_fn_do.js build/step5_tco.js build/step6_file.js build/step7_interop.js build/step8_macros.js build/step9_try.js build/stepA_miniMAL.js miniMAL.js
rm -fr build/cljs-runtime
rmdir -p build || true
rmdir: failed to remove 'build': No such file or directory
rmdir -p src-min/miniMAL || true
rmdir: failed to remove 'src-min/miniMAL': No such file or directory
On branch gh-pages
Your branch is up to date with 'origin/gh-pages'.

Changes not staged for commit:
	deleted:    js/miniMAL-core.js
	deleted:    js/miniMAL-node.js
	deleted:    js/web/miniMAL-core.js
	deleted:    js/web/miniMAL-js1k.js
	deleted:    js/web/miniMAL-min.js

no changes added to commit