Revert "stack/slapos: version up slapos.toolbox 0.113"

This reverts commit 5d46a499.

Changes to "fix argument parsing" (to allow passing argument containing space)
had a regression that backslash characters are escaped.

Let's go back to slapos.toolbox 0.112 for now.

stack/slapos.cfg

@@ -198,7 +198,7 @@ slapos.libnetworkcache = 0.20
 slapos.rebootstrap = 4.5
 slapos.recipe.build = 0.46
 slapos.recipe.cmmi = 0.16
-slapos.toolbox = 0.113
+slapos.toolbox = 0.112
 stevedore = 1.21.0
 subprocess32 = 3.5.3
 unicodecsv = 0.14.1