configure: do not quote arguments passed to filter{,_out} in check_ld.

This fixes the following error:
./configure: eval: line 417: syntax error near unexpected token `-lcdio_cdda'
[...]
Broken by 66a1ccd7 when doing, e.g., ./configure --enable-gpl --enable-libcdio.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -769,8 +769,8 @@ check_ld(){
     log check_ld "$@"
     type=$1
     shift 1
-    flags=$(filter_out '-l*' "$@")
-    libs=$(filter '-l*' "$@")
+    flags=$(filter_out '-l*' $@)
+    libs=$(filter '-l*' $@)
     check_$type $($cflags_filter $flags) || return
     flags=$($ldflags_filter $flags)
     libs=$($ldflags_filter $libs)