[AArch64] Implement extshx and extsbx.
[AArch64] Implement cntlzwx.
[AArch64] Implement negx.
[AArch64] Implement mcrf.
[AArch64] Implement mtsr and mfsr
[AArch64] Implement mtsprin and mfsprin
[AArch64] Implement mfmsr
DolphinWX: Fix case where the debugger would crash on hiding a pane.

These ID values would clash with the window parent IDs of all the actual debugger panes (they are in the 350 range as well).

For example, attempting to show and then close the memory window would cause an assertion, because it would attempt to destroy the text control for searching through memory, rather than destroying the actual parent window it's attached to.

These IDs are only used locally, so their value doesn't matter.
[AArch64] Implement twi and tw.
Android: Silence a few warnings
OGL: Get rid of explicit deletes in RasterFont
Fix some warnings on Linux
Core: Fix SIGABRT possibility in EXI_DeviceGecko

Fixes issue 7586
Merge pull request #1137 from lioncash/debugger-crash

DolphinWX: Fix case where the debugger would crash on hiding a pane.
Merge pull request #1143 from lioncash/exi

Core: Fix SIGABRT possibility in EXI_DeviceGecko
Merge pull request #1141 from lioncash/rasterogl

OGL: Get rid of explicit deletes in RasterFont
Change netplay buffer SpinCtrl to default to 5.
Merge branch 'master' of https://github.com/dolphin-emu/dolphin into VR-Hydra
Merge pull request #1145 from RachelBryk/buffer

Change netplay buffer SpinCtrl to default to 5.
Merge pull request #1140 from lioncash/android

Android: Silence a few warnings