### Please describe the problem.
Impossible installation on Android 4.3


### What version of git-annex are you using? On what operating system?
The lastest version of git-annex, and Android 4.3, **without sdcard** (Wiko Wax)

### Please provide any additional information below.

The message given by git-annex:


    Falling back to hardcoded app location; cannot find expected files in /data/app-lib 
    mkdir: can't create directory '/sdcard/git-annex.home': Permission denied
    mkdir of /sdcard/git-annex.home failed !
    lib/lib.runshell.so: line 133: can't create /sdcard/git-annex.home/git-annex-install.log: Permission denied 
    Installation failed ! Please report a but and attach /sdcard/git-annex.home/git-annex-install.log

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