patch 8.2.2089: libvterm test fails to build on Mac

Problem:    Libvterm test fails to build on Mac.
Solution:   Adjust configure to remove a space between -L and the path that
            follows.
diff --git a/src/auto/configure b/src/auto/configure
index d135948..205312a 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -14861,6 +14861,8 @@
 $as_echo "no" >&6; }
 fi
 
+LDFLAGS=`echo "$LDFLAGS" | sed -e 's/-L /-L/g'`
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker --as-needed support" >&5
 $as_echo_n "checking linker --as-needed support... " >&6; }
 LINK_AS_NEEDED=