arch/x86: Move sys_fatal_error_handler.c to 'core'

One of many steps in the transforming BSPs to platforms work item.  At the end
of this work item, there should not be any code in the 'arch/x86' directory.

Change-Id: I78bf1738f4450faa078a8510ab342eb9d9277b91
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>

arch/x86/Makefile

@@ -1,5 +1,5 @@
 
-obj-y = crt0.o sys_fatal_error_handler.o driver_static_irq_stubs.o
+obj-y = crt0.o driver_static_irq_stubs.o
 
 ifneq ($(CONFIG_CLFLUSH_INSTRUCTION_SUPPORTED),y)
 obj-y += cache_s.o

arch/x86/core/Makefile

@@ -3,7 +3,7 @@ ccflags-y += -I$(srctree)/kernel/microkernel/include
 
 obj-y = gdt.o context.o fatal.o cpuhalt.o \
 	excstub.o swap.o ffs.o intboiexit.o msr.o \
-	excconnect.o inthndlset.o
+	excconnect.o inthndlset.o sys_fatal_error_handler.o
 
 ifeq ($(CONFIG_LOCK_INSTRUCTION_UNSUPPORTED),y)
 obj-y += atomic_nolock.o