Add libmeminfo_test into TEST_MAPPING

Include libmeminfo_test into presubmit test list. Move showmap_test.sh out
of directory used by the test so that TreeHugger does not run this script
as part of libmeminfo_test.

Bug: 144949774
Change-Id: I48090cd6f05f39467d50b7ddf403c9abcda037db
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
3 files changed