Added a test for glibtoolize so that the autoconf tools that come installed on...

Added a test for glibtoolize so that the autoconf tools that come installed on OSX will work fine (so no need to replace them). 

BUILD/autorun.sh

@@ -4,8 +4,14 @@
 aclocal    || (echo "Can't execute aclocal" && exit 1)
 autoheader || (echo "Can't execute autoheader" && exit 1)
 # --force means overwrite ltmain.sh script if it already exists 
-libtoolize --automake --force \
-           || (echo "Can't execute libtoolize" && exit 1)
+# Added glibtoolize reference to make native OSX autotools work
+if [ -f /usr/bin/glibtoolize ] ; then
+  glibtoolize --automake --force \
+             || (echo "Can't execute glibtoolize" && exit 1)
+else
+  libtoolize --automake --force \
+             || (echo "Can't execute libtoolize" && exit 1)
+fi
 # --add-missing instructs automake to install missing auxiliary files
 # and --force to overwrite them if they already exist
 automake --add-missing --force \