created /kernel/isr subdir, moved isr.asm from boot to isr module, added interrupts.cc for isr() main function and isr_bootstrap() routine

git-svn-id: svn://anubis/hos/trunk@66 5b3e749e-e535-0410-8002-a9bb6afbdfca

kernel/Makefile

@@ -15,7 +15,7 @@ export CXXFLAGS := -Wall -O2 -fno-rtti -fno-exceptions
 export LDFLAGS  := -T $(LDSCRIPT) -Map $(KERNEL).map
 export LDLIBS   := `$(CC) -print-libgcc-file-name`
 
-SUBDIRS         := boot mm lang
+SUBDIRS         := boot mm lang isr
 SUBDIRS_clean   := $(SUBDIRS:%=%.clean)
 
 .PHONY: all