make: clean after distclean deletes source files

Run 'make distclean' in a tree, and GNUmakefile is removed.
But, GNUmakefile is where we change directory to build.
Run 'make distclean' or 'make clean' again, and Makefile applies
the clean actions, such as this one, at the top level of the tree.
For example, it removes the .d source files in 'meson/test cases/d/*/*.d'.

    find . \( -name '*.so' -o -name '*.dll' -o \
          -name '*.[oda]' -o -name '*.gcno' \) -type f \
        ! -path ./roms/edk2/ArmPkg/Library/GccLto/liblto-aarch64.a \
        ! -path ./roms/edk2/ArmPkg/Library/GccLto/liblto-arm.a \
        -exec rm {} +

To fix, remove clean and distclean from UNCHECKED_GOALS, so those targets
are "checked", meaning that configure must be run before make.  However,
the check action does not trigger, because clean does not depend on
config-host.mak, so change the action to simply throw an error.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Message-Id: <1681909700-94095-1-git-send-email-steven.sistare@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Makefile

@@ -26,7 +26,7 @@ quiet-command-run = $(if $(V),,$(if $2,printf "  %-7s %s\n" $2 $3 && ))$1
 quiet-@ = $(if $(V),,@)
 quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)
 
-UNCHECKED_GOALS := %clean TAGS cscope ctags dist \
+UNCHECKED_GOALS := TAGS gtags cscope ctags dist \
     help check-help print-% \
     docker docker-% vm-help vm-test vm-build-%
 
@@ -176,10 +176,8 @@ plugins:
 endif # $(CONFIG_PLUGIN)
 
 else # config-host.mak does not exist
-config-host.mak:
 ifneq ($(filter-out $(UNCHECKED_GOALS),$(MAKECMDGOALS)),$(if $(MAKECMDGOALS),,fail))
-	@echo "Please call configure before running make!"
-	@exit 1
+$(error Please call configure before running make)
 endif
 endif # config-host.mak does not exist