acpihalt: fix GRUB_DSDT_TEST compilation

grub-core/commands/acpihalt.c

@@ -26,6 +26,8 @@
 
 #define grub_dprintf(cond, args...) printf ( args )
 #define grub_printf printf
+#define grub_util_fopen fopen
+#define grub_memcmp memcmp
 typedef uint64_t grub_uint64_t;
 typedef uint32_t grub_uint32_t;
 typedef uint16_t grub_uint16_t;

include/grub/acpi.h

@@ -22,6 +22,8 @@
 #ifndef GRUB_DSDT_TEST
 #include <grub/types.h>
 #include <grub/err.h>
+#else
+#define GRUB_PACKED __attribute__ ((packed))
 #endif
 
 #define GRUB_RSDP_SIGNATURE "RSD PTR "