Provide a restart to clone the ansi-test repository if necessary

[easye]

<jr82> When I run command > "ant test.ansi.interpreted", I got same thing in                                                  
       console as well as log file. Do I need to do some other configuration ?                                                
                                                                        [06:25]                                               
<jr82> Armed Bear Common Lisp 1.8.1-dev                                                                                       
<jr82>   Java 17.0.2 Homebrew                                                                                                 
<jr82>   OpenJDK 64-Bit Server VM                                                                                             
<jr82>   Low-level initialization completed in 0.22 seconds.                                                                  
<jr82>   Startup completed in 1.172 seconds.                                                                                  
<jr82>   Caught FILE-ERROR while processing --eval option "(asdf:test-system                                                  
       :abcl/test/ansi/interpreted)":                                                                                         
<jr82>     The file #P"/Users/jr/w/SourceCodes/ansi-test/rt-package.lsp" does                                                 
       not exist.                                                                                                             
<jr82>   Java Result: 2                                                                                                       
<jr82> I am following instruction as per contrib wiki                   [06:27]                                               
<jr82> I think JDK 17 is not supported. Trying with JDK 14 now.         [06:34]       

Probably better to put the download location of the ansi-test suite under the appropiate XDG-mumble.

[easye]

Implementation: go for a uiop:run-program possibly using abcl-build PATH execution interpolation for the git binary.