[PULL 3/5] roms: Add a 'make help' target alias

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Various C projects provide a 'make help' target. Our root directory
does so. The roms/ directory lacks a such rule, but already displays
a help output when the default target is called.
Add a 'help' target aliased to the default one, to avoid:

  $ make -C roms help
  make: *** No rule to make target 'help'.  Stop.

Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190920171159.18633-1-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 roms/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/roms/Makefile b/roms/Makefile
index 6cf07d3b44..3ffd13cc7e 100644
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -51,7 +51,7 @@ SEABIOS_EXTRAVERSION="-prebuilt.qemu.org"
 #
 EDK2_EFIROM = edk2/BaseTools/Source/C/bin/EfiRom
 
-default:
+default help:
 	@echo "nothing is build by default"
 	@echo "available build targets:"
 	@echo "  bios               -- update bios.bin (seabios)"
-- 
2.21.0