setup.sh: Fix cleanup in matching files

The original mechanism to identify files to cleanup
relied on glob matching from the output of 'echo'
piped to a grep.  This yields a case where some
objects can appear and picked up as matching because
other items on the same line matched the grep
string.   Changing this to use 'ls -1' which will
restrict the grep string matching to individual lines
thereby only picking up the entities the script
intended to do.

Change-Id: I020c80236fa68bcabeca0299fe7a27f3320de97b
Signed-off-by: Lance Hartmann <lance.hartmann@oracle.com>
Reviewed-on: https://review.gerrithub.io/437380


Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>