Update Changelog and VERSION for 0.12.0-rc2

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Changelog

+version 0.12.0-rc2:
+
+  - v2: properly save kvm system time msr registers (Glauber Costa)
+  - convert more monitor commands to qmp (Luiz Capitulino)
+  - vnc: fix capslock tracking logic. (Gerd Hoffmann)
+  - QemuOpts: allow larger option values. (Gerd Hoffmann)
+  - scsi: fix drive hotplug. (Gerd Hoffmann)
+  - pci: don't hw_error() when no slot is available. (Gerd Hoffmann)
+  - pci: don't abort() when trying to hotplug with acpi off. (Gerd Hoffmann)
+  - allow default devices to be implemented in config file (Gerd Hoffman)
+  - vc: colorize chardev title line with blue background. (Gerd Hoffmann)
+  - chardev: make chardevs specified in config file work. (Gerd Hoffmann)
+  - qdev: also match bus name for global properties (Gerd Hoffmann)
+  - qdev: add command line option to set global defaults for properties. (Gerd Hoffmann)
+  - kvm: x86: Save/restore exception_index (Jan Kiszka)
+  - qdev: Replace device names containing whitespace (Markus Armbruster)
+  - fix rtc-td-hack on host without high-res timers (Gleb Natapov)
+  - virtio: verify features on load (Michael S. Tsirkin)
+  - vmware_vga: add rom file so that it boots. (Dave Airlie)
+  - Do not abort on qemu_malloc(0) in production builds (Anthony Liguori)
+  - Fix ARM userspace strex implementation. (Paul Brook)
+  - qemu: delete rule target on error (Michael S. Tsirkin)
+  - QMP: add human-readable description to error response (Markus Armbruster)
+  - convert more monitor commands to QError (Markus Armbruster)
+  - monitor: Fix double-prompt after "change vnc passwd BLA" (Markus Armbruster)
+  - monitor: do_cont(): Don't ask for passwords (Luiz Capitulino)
+  - monitor: Introduce 'block_passwd' command (Luiz Capitulino)
+  - pci: interrupt disable bit support (Michael S. Tsirkin)
+  - pci: interrupt status bit implementation (Michael S. Tsirkin)
+  - pci: prepare irq code for interrupt state (Michael S. Tsirkin)
+  - msix: function mask support (Michael S. Tsirkin)
+  - msix: macro rename for function mask support (Michael S. Tsirkin)
+  - cpuid: Fix multicore setup on Intel (Andre Przywara)
+  - kvm: x86: Fix initial kvm_has_msr_star (Jan Kiszka)
+  - Update OpenBIOS images to r640 (Aurelien Jarno)	
+
 version 0.10.2:
 
   - fix savevm/loadvm (Anthony Liguori)

VERSION

-0.11.91
+0.11.92