build systems: move git_sha1_gen.sh to bin/

There was no reason for this script to live outside the scripts
directory.

Suggested-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/SConscript

@@ -24,7 +24,7 @@ def write_git_sha1_h_file(filename):
 
     tempfile = "git_sha1.h.tmp"
     with open(tempfile, "w") as f:
-        args = [ 'sh', Dir('#').abspath + '/git_sha1_gen.sh' ]
+        args = [ 'sh', Dir('#').abspath + '/bin/git_sha1_gen.sh' ]
         try:
             subprocess.Popen(args, stdout=f).wait()
         except: