ext qmsi: Update QMSI to 1.4 RC4

No major fixes since RC3 were made, and mostly the security fixes
for the Quark Bootloader were the main driver behind this new QMSI
Release Candidate.

There are no changes to shim drivers at this moment.

JIRA: ZEP-1572

Change-Id: I68d2b0ee90863d3def909de556314bd86712a059
Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>