Changed arraylist implementation to avoid floating point.

Changed arraylist implementation to avoid floating point.

Updated calculation of u_arraylist growth to no longer use
floating point. This helps for limited platforms that might
not have native FP support, such as some Arduino boards.

Change-Id: I7d8923786ac31cab8eb3004c8a956d36d884ec29
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2382
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>