Workaround for MacOSX gatekeeper (OSX 10.10.4)

It seems that gatekeeper now applies tighter checks on
libraries dinamically linked from executables included
in a package.

This is a workaround until a proper solution is found.

Fixes arduino#3468

build/build.xml

@@ -409,14 +409,19 @@
       <param name="unpack_target" value="untar"/>
       <param name="gcc_archive_file" value="avr-gcc-4.8.1-arduino5-i386-apple-darwin11.tar.bz2"/>
       <param name="gcc_version" value="4.8.1-arduino5"/>
-      <param name="avrdude_archive_file" value="avrdude-6.0.1-arduino5-i386-apple-darwin11.tar.bz2"/>
+      <param name="avrdude_archive_file" value="avrdude-6.0.1-arduino5-r2-i386-apple-darwin11.tar.bz2"/>
       <param name="avrdude_version" value="6.0.1-arduino5"/>
     </antcall>
 
     <chmod perm="+x">
       <fileset dir="${staging_folder}/work/${staging_hardware_folder}/tools" includes="**/bin/*"/>
       <fileset dir="${staging_folder}/work/${staging_hardware_folder}/tools" includes="**/libexec/gcc/avr/4.8.1/*"/>
     </chmod>
+
+    <!-- macosx gatekeeper workaround. See https://github.com/arduino/Arduino/issues/3468 -->
+    <chmod perm="-x">
+      <fileset dir="${staging_folder}/work/${staging_hardware_folder}/tools" includes="**/bin/avrdude_bin" />
+    </chmod>
   </target>
 
   <target name="macosx-old-run" depends="macosx-old-build" description="Run Mac OS X version">

build/macosx/avrdude-6.0.1-arduino5-r2-i386-apple-darwin11.tar.bz2.sha

@@ -0,0 +1 @@
+52afce6cbe1cc1021bca1234cf25b298350f97dd