Free memory the 'rpaths' pointers, that may incur memory leaks(VPP-965).
Free memory the 'rpaths' pointers, that may incur memory leaks(VPP-965).

Change-Id: I2732c02b97f4602162638bbcf3ab46521c2782da
Signed-off-by: ShenJibiao <52c42bc45adbff39bd1b901966779e91a81037c3@zte.com.cn>

vpp-dev/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp