Update `GNUmakefile` for spacing and to add `run-debugger` command.

GNUmakefile

@@ -132,8 +132,8 @@ $(OBJDIR)/u-asm.h: u-lib.hh lib.hh types.h x86-64.h build/mkkernelasm.awk $(BUIL
 $(OBJDIR)/k-firstprocess.h:
 	$(call run,echo '#ifndef CHICKADEE_FIRST_PROCESS' >$@; echo '#define CHICKADEE_FIRST_PROCESS "$(CHICKADEE_FIRST_PROCESS)"' >>$@; echo '#endif' >>$@,CREATE $@)
 
- $(OBJDIR)/chickadee.gdb:
- 	$(call run,echo 'add-symbol-file obj/p-$(CHICKADEE_FIRST_PROCESS).full 0x100000' >$@,CREATE $@)
+$(OBJDIR)/chickadee.gdb:
+	$(call run,echo 'add-symbol-file obj/p-$(CHICKADEE_FIRST_PROCESS).full 0x100000' >$@,CREATE $@)
 
 $(OBJDIR)/k-initfs.cc: build/mkinitfs.awk \
 	$(INITFS_CONTENTS) $(INITFS_BUILDSTAMP) $(KERNELBUILDSTAMPS)
@@ -228,7 +228,7 @@ QEMUIMG = -M q35 \
 run: run-$(QEMUDISPLAY)
 	@:
 run-gdb-report:
-	@if test "$(QEMUGDB)" = "-gdb tcp::12949"; then echo '* Run `gdb -x build/weensyos.gdb` to connect gdb to qemu.' 1>&2; fi
+	@if test "$(QEMUGDB)" = "-gdb tcp::12949"; then echo '* Run `gdb -x build/chickadee.gdb` to connect gdb to qemu.' 1>&2; fi
 run-graphic: $(QEMUIMAGEFILES) check-qemu run-gdb-report
 	$(call run,$(QEMU_PRELOAD) $(QEMU) $(QEMUOPT) $(QEMUGDB) $(QEMUIMG),QEMU $<)
 run-console: $(QEMUIMAGEFILES) check-qemu-console run-gdb-report
@@ -242,8 +242,9 @@ run-gdb-console: $(QEMUIMAGEFILES) check-qemu-console
 run-gdb-graphic: $(QEMUIMAGEFILES) check-qemu
 	$(call run,$(QEMU_PRELOAD) $(QEMU) $(QEMUOPT) -S -gdb tcp::12949 $(QEMUIMG) &,QEMU $<)
 	$(call run,sleep 0.5; gdb -x build/chickadee.gdb,GDB)
-run-debug:
-  $(call run,gdb -x build/chickadee.gdb,GDB)
+
+run-debugger:
+	$(call run,gdb -x build/chickadee.gdb,GDB)
 
 run-$(RUNSUFFIX): run
 run-graphic-$(RUNSUFFIX): run-graphic