arch: x86 -> x86_64 and build system changes

arch/x86_64/elfboot/raw.lds

@@ -0,0 +1,37 @@
+ENTRY(_start)
+
+PHDRS
+{
+	text PT_LOAD;
+	data PT_LOAD;
+}
+
+SECTIONS
+{
+	. = SIZEOF_HEADERS;
+    . = ALIGN(4096);
+	.text :	{
+	      *(.text)
+	} :text
+	.data : {
+	      *(.data)
+	      *(.data.*)
+	} :data
+	.rodata : {
+	      *(.rodata .rodata.*)
+	} :data
+
+	. = ALIGN(8);
+	.bss : {
+	     _bss_start = .;
+	     *(.bss .bss.*)
+	     _bss_end = .;
+         . = ALIGN(4096);
+         _stack_end = .;
+    } :data
+
+	/DISCARD/ : {
+	     *(.eh_frame)
+         *(.note.gnu.build-id)
+	}
+}