Ensure `pwd`/dist exists always and is 777.

  Fixes #192

Signed-off-by: Scott M. Likens <[email protected]>

script/build-linux

@@ -1,3 +1,5 @@
 #!/bin/sh
+mkdir -p `pwd`/dist
+chmod 777 `pwd`/dist
 docker build -t fig .
 docker run -v `pwd`/dist:/code/dist fig pyinstaller -F bin/fig