cmake: add support for cd-rom booting via Bochs

arch/x86_64/Bochs.cmake

@@ -0,0 +1,18 @@
+find_program(BOCHS bochs)
+
+if (NOT BOCHS)
+	message(STATUS "Bochs: cannot find bochs")
+	return()
+endif ()
+
+if (NOT TARGET cdrom)
+	message(STATUS "Bochs: CD-ROM image creation is unavailable. Cannot use bochs")
+	return()
+endif ()
+
+message(STATUS "Bochs: Enable CD-ROM boot")
+add_custom_target(run-cdrom-bochs
+	COMMAND ${BOCHS} -q -f ${CMAKE_SOURCE_DIR}/arch/${CMAKE_SYSTEM_PROCESSOR}/bochsrc.bxrc
+	WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+	USES_TERMINAL
+	DEPENDS cdrom)