roms: remind the user about gkb files

nowadays, we don't insert GRUB keymaps automatically, for
sake of efficiency; without one, the default is US QWERTY.

a user will only want one keymap in particular, so this
is more efficient. in practise, they're either building
from source anyway, or using the inject scripts which
compile cbfstool anyway, so the user will already have
cbfstool.

also output this message from the inject script.

Signed-off-by: Leah Rowe <leah@libreboot.org>

include/lib.sh

@@ -7,6 +7,8 @@ export LC_COLLATE=C
 export LC_ALL=C
 
 _ua="Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0"
+kbnotice="Insert a .gkb file from config/data/grub/keymap/ as keymap.gkb \
+if you want a custom keymap in GRUB; use cbfstool from elf/cbfstool."
 
 tmpdir_was_set="y"
 cbdir="src/coreboot/default"

include/vendor.sh

@@ -261,7 +261,8 @@ vendor_inject()
 	inject_vendorfiles
 	[ "$nukemode" = "nuke" ] && return 0
 	printf "Friendly reminder (this is *not* an error message):\n"
-	printf "Please ensure that the files were inserted correctly.\n"
+	printf "Please ensure that the files were inserted correctly. ALSO:\n"
+	printf "%s\n" "$kbnotice"
 }
 
 check_board()

script/roms

@@ -43,9 +43,10 @@ main()
 		    && targets="$targets, $x"; continue
 	done
 
-	[ -z "$targets" ] && $err "No ROM images were compiled"
+#	[ -z "$targets" ] && $err "No ROM images were compiled"
 	printf "Check these ROM directories in bin/: %s\n" "${targets#, }"
-	printf "DO NOT flash images from elf/ - please use bin/ instead.\n"
+	printf "DO NOT flash images from elf/ - use bin/ instead. ALSO:\n"
+	printf "%s\n" "$kbnotice"
 }
 
 mkserprog()