Implement automatic module license checking according to new GNU

guidelines.

	* grub-core/kern/dl.c (grub_dl_check_license): New function.
	(grub_dl_load_core): Use grub_dl_check_license.
	* include/grub/dl.h (GRUB_MOD_SECTION): New macro.
	(GRUB_MOD_LICENSE): Likewise.
	(GRUB_MOD_DUAL_LICENSE): Likewise.
	All modules updated.

grub-core/commands/efi/fixvideo.c

@@ -24,6 +24,8 @@
 #include <grub/command.h>
 #include <grub/i18n.h>
 
+GRUB_MOD_LICENSE ("GPLv3+");
+
 static struct grub_video_patch
 {
   const char *name;

grub-core/commands/efi/loadbios.c

@@ -25,6 +25,8 @@
 #include <grub/command.h>
 #include <grub/i18n.h>
 
+GRUB_MOD_LICENSE ("GPLv3+");
+
 static grub_efi_guid_t acpi_guid = GRUB_EFI_ACPI_TABLE_GUID;
 static grub_efi_guid_t acpi2_guid = GRUB_EFI_ACPI_20_TABLE_GUID;
 static grub_efi_guid_t smbios_guid = GRUB_EFI_SMBIOS_TABLE_GUID;

grub-core/commands/efi/lsefimmap.c

@@ -23,6 +23,8 @@
 #include <grub/efi/efi.h>
 #include <grub/command.h>
 
+GRUB_MOD_LICENSE ("GPLv3+");
+
 #define ADD_MEMORY_DESCRIPTOR(desc, size)	\
   ((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size)))
 

grub-core/commands/efi/lsefisystab.c

@@ -18,12 +18,15 @@
  */
 #include <grub/types.h>
 #include <grub/mm.h>
+#include <grub/dl.h>
 #include <grub/misc.h>
 #include <grub/normal.h>
 #include <grub/charset.h>
 #include <grub/efi/api.h>
 #include <grub/efi/efi.h>
 
+GRUB_MOD_LICENSE ("GPLv3+");
+
 struct guid_mapping
 {
   grub_efi_guid_t guid;

grub-core/commands/efi/lssal.c

@@ -23,6 +23,9 @@
 #include <grub/charset.h>
 #include <grub/efi/api.h>
 #include <grub/efi/efi.h>
+#include <grub/dl.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
 
 static void
 disp_sal (void *table)