sysemu: Split sysemu/runstate.h off sysemu/sysemu.h

sysemu/sysemu.h is a rather unfocused dumping ground for stuff related
to the system-emulator.  Evidence:

* It's included widely: in my "build everything" tree, changing
  sysemu/sysemu.h still triggers a recompile of some 1100 out of 6600
  objects (not counting tests and objects that don't depend on
  qemu/osdep.h, down from 5400 due to the previous two commits).

* It pulls in more than a dozen additional headers.

Split stuff related to run state management into its own header
sysemu/runstate.h.

Touching sysemu/sysemu.h now recompiles some 850 objects.  qemu/uuid.h
also drops from 1100 to 850, and qapi/qapi-types-run-state.h from 4400
to 4200.  Touching new sysemu/runstate.h recompiles some 500 objects.

Since I'm touching MAINTAINERS to add sysemu/runstate.h anyway, also
add qemu/main-loop.h.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190812052359.30071-30-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
[Unbreak OS-X build]

hw/misc/arm_sysctl.c

@@ -11,11 +11,11 @@
 #include "hw/irq.h"
 #include "hw/qdev-properties.h"
 #include "qemu/timer.h"
+#include "sysemu/runstate.h"
 #include "qemu/bitops.h"
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "hw/arm/primecell.h"
-#include "sysemu/sysemu.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
 

hw/misc/cbus.c

@@ -24,7 +24,7 @@
 #include "hw/hw.h"
 #include "hw/irq.h"
 #include "hw/misc/cbus.h"
-#include "sysemu/sysemu.h"
+#include "sysemu/runstate.h"
 
 //#define DEBUG
 

hw/misc/exynos4210_pmu.c

@@ -28,7 +28,7 @@
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "qemu/module.h"
-#include "sysemu/sysemu.h"
+#include "sysemu/runstate.h"
 
 #ifndef DEBUG_PMU
 #define DEBUG_PMU           0

hw/misc/imx7_snvs.c

@@ -16,7 +16,7 @@
 #include "hw/misc/imx7_snvs.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
-#include "sysemu/sysemu.h"
+#include "sysemu/runstate.h"
 
 static uint64_t imx7_snvs_read(void *opaque, hwaddr offset, unsigned size)
 {

hw/misc/iotkit-sysctl.c

@@ -20,9 +20,9 @@
 #include "qemu/bitops.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
+#include "sysemu/runstate.h"
 #include "trace.h"
 #include "qapi/error.h"
-#include "sysemu/sysemu.h"
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "hw/registerfields.h"

hw/misc/macio/cuda.c

@@ -32,7 +32,7 @@
 #include "hw/misc/mos6522.h"
 #include "hw/misc/macio/cuda.h"
 #include "qemu/timer.h"
-#include "sysemu/sysemu.h"
+#include "sysemu/runstate.h"
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/module.h"

hw/misc/macio/pmu.c

@@ -39,7 +39,7 @@
 #include "hw/misc/macio/gpio.h"
 #include "hw/misc/macio/pmu.h"
 #include "qemu/timer.h"
-#include "sysemu/sysemu.h"
+#include "sysemu/runstate.h"
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/module.h"

hw/misc/pvpanic.c

@@ -13,9 +13,9 @@
  */
 
 #include "qemu/osdep.h"
-#include "sysemu/sysemu.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
+#include "sysemu/runstate.h"
 
 #include "hw/nvram/fw_cfg.h"
 #include "hw/qdev-properties.h"

hw/misc/slavio_misc.c

@@ -23,11 +23,11 @@
  */
 
 #include "qemu/osdep.h"
-#include "sysemu/sysemu.h"
 #include "hw/irq.h"
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "qemu/module.h"
+#include "sysemu/runstate.h"
 #include "trace.h"
 
 /*

hw/misc/zynq_slcr.c

@@ -16,9 +16,9 @@
 
 #include "qemu/osdep.h"
 #include "qemu/timer.h"
+#include "sysemu/runstate.h"
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
-#include "sysemu/sysemu.h"
 #include "qemu/log.h"
 #include "qemu/module.h"