libmetal: update to use rc2 tag
libmetal: update to use rc2 tag

Update to use xilinx-v2016.3-rc2 tag

Signed-off-by: Wendy Liang <jliang@xilinx.com>

Signed-off-by: Manjukumar Matha <4c64a17569570cb9f1048973bce031c402b55312@xilinx.com>

Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux