script/run-make.sh: quote targets with double quote

script/run-make.sh: quote targets with double quote

in
ceph-build/ceph-perf-pull-requests/config/definitions/ceph-perf-pull-requests.yml,
we pass "vstart-base crimson-osd" as the targets argument, but the
build() function in ceph/src/script/run-make.sh fails to quote them, so
they are expanded into two argument of `test -n`. hence it breaks like

src/script/run-make.sh: line 124: test: vstart-base: binary operator expected
make will run with option(s) -j40
Unknown argument vstart-base
Unknown argument crimson-osd

Signed-off-by: Kefu Chai <kchai@redhat.com>