This is a first hand fix against double-quoting libparrot on mingw.
libparrot is already quoted in hints/mswin32.pm libparrot_ldflags 

A better fix would detected spaces in build_dir and quote the space
with \ on posix shells, and protect it with " on mswin32.

destdir or any other targetdir spaces need to to be detected like 
this, since their are entered by the user and as such properly 
quoted by the user.

Index: parrot-svn/config/gen/makefiles/dynoplibs_pl.in
===================================================================
--- parrot-svn.orig/config/gen/makefiles/dynoplibs_pl.in
+++ parrot-svn/config/gen/makefiles/dynoplibs_pl.in
@@ -35,15 +35,7 @@ our $LIBPARROT = q[];
 #IF(parrot_is_shared):$LIBPARROT = q[@libparrot_ldflags@];
 
 # Here comes some stuff for Win32.
-our $PATHQUOTE = q[];
-if ($^O eq 'MSWin32') {
-    # Paths need quoting as they may contain spaces.
-    $PATHQUOTE = q["];
-
-    unless ($CC =~ /gcc/i) {
-        $LIBPARROT = '@build_dir@/libparrot@a@';
-    }
-}
+our $PATHQUOTE = $^O eq 'MSWin32' ? '"' : '';
 
 # OPS2C Config
 our $OPS2C = "$PERL -I $PATHQUOTE" .