Update the cd script to work with directory names that include spaces

This patch adds (escaped) quotation marks around the directory argument
to the builtin cd so that the user can cd into a directory with spaces
in it

Author: yithian

scripts/env/cd

@@ -19,7 +19,7 @@ fi
 if __gvm_is_function cd; then
     eval "$(echo "__gvm_oldcd()"; declare -f cd | sed '1 s/{/\'$'\n''{/' | tail -n +2)"
 elif [[ "$(builtin type cd)" == "cd is a shell builtin" ]]; then
-    eval "$(echo "__gvm_oldcd() { builtin cd \$*; return \$?; }")"
+    eval "$(echo "__gvm_oldcd() { builtin cd \"\$*\"; return \$?; }")"
 fi
 
 # Path cleanup