Set explicit shell so better-shell-remote-open works on phone

custom.el

@@ -14,6 +14,8 @@
  '(dired-listing-switches "-alh")
  '(elpy-eldoc-show-current-function
    nil)
+ '(explicit-shell-file-name
+   "/bin/bash")
  '(find-file-suppress-same-file-warnings
    t)
  '(hippie-expand-try-functions-list