[ELSA-2019-4640] qemu security update

[15:3.1.0-3.el7]
- x86: Document CVE-2018-12126 CVE-2018-12130 CVE-2018-12127 CVE-2019-11091 as
fixed (Mark Kanda) [Orabug: 29744956] {CVE-2018-12126} {CVE-2018-12127}
{CVE-2018-12130} {CVE-2019-11091}

[15:3.1.0-2.el7]
- x86: Add mds feature (Karl Heubaum)
- e1000: Never increment the RX undersize count register (Chris Kenna)
- qemu.spec: audioflags set but never passed to configure script (Liam Merwick) [Orabug: 29715562]
- parfait: deal with parfait returning non-zero return value (Liam Merwick) [Orabug: 29715548]
- parfait: use nproc to choose default number of threads (Liam Merwick) [Orabug: 29715548]
- parfait: provide option to upload results (Liam Merwick) [Orabug: 29715548]
- parfait: disable misaligned-access check (Liam Merwick) [Orabug: 29715548]
- Document CVE-2019-8934 and CVE-2019-5008 as fixed (Mark Kanda) [Orabug: 29715605] {CVE-2019-5008} {CVE-2019-8934}
- device_tree.c: Don't use load_image() (Peter Maydell) [Orabug: 29715527] {CVE-2018-20815}
- slirp: check sscanf result when emulating ident (William Bowling) [Orabug: 29715525] {CVE-2019-9824}
- i2c-ddc: fix oob read (Gerd Hoffmann) [Orabug: 29715520] {CVE-2019-3812}
- scsi-generic: avoid possible out-of-bounds access to r->buf (Paolo Bonzini) [Orabug: 29259700] {CVE-2019-6501}
- slirp: check data length while emulating ident function (Prasad J Pandit) [Orabug: 29715755] {CVE-2019-6778}