Syntax fix in configure.ac.

diff --git a/configure b/configure
index 10091f8..508d028 100755
--- a/configure
+++ b/configure
@@ -14121,7 +14121,7 @@
 
             IOKITLIB="-framework IOKit"
 
-	    	    IOKITLIB = "$IOKITLIB $COREFOUNDATIONLIB"
+	    	    IOKITLIB="$IOKITLIB $COREFOUNDATIONLIB"
           else
             echo "$as_me:$LINENO: checking whether we can build an HP-UX dll" >&5
 echo $ECHO_N "checking whether we can build an HP-UX dll... $ECHO_C" >&6