Specify CEF Framework link in bakefile system instead configure.

Add CEF framework link in configure will cause each binary builds with
CEF framework path option. We only need to link CEF framework on
building webview library.

build/bakefiles/config.bkl

@@ -606,4 +606,10 @@ For example, add "-F pe-i386" here if using 64 bit windres for 32 bit build.
         </if>
     </set>
 
+    <set var="LIBCEF_FRAMEWORK">
+        <if cond="PLATFORM_MACOSX=='1'">
+            -F$(TOP_SRCDIR)cef/Release/ -framework Chromium\ Embedded\ framework
+        </if>
+    </set>
+
 </makefile>