It's a common practice to have /tmp/ mounted separately with noexec
option. This effectively means no scripts can be executed from the
filesystem mounted to /tmp.
This patch explicitly calls sh binary to execute scripts from /tmp and
removes the executable flag from the scripts.
Closes-Bug: #1965183
Change-Id: I2f9cd67979a8a75848fcdd7a8c3bb56dd3590473
Signed-off-by: Jakub Libosvar <libosvar@redhat.com>