Add 'prioritize' command to cgpt tool.

cgpt/cgpt.h

Index: cgpt/cgpt.h
diff --git a/cgpt/cgpt.h b/cgpt/cgpt.h
index 85702a4f6035d0cfde6de592b8c8e47241431e98..3f117bba9088c96d465b2f4f5dc56d43bab51e1a 100644
--- a/cgpt/cgpt.h
+++ b/cgpt/cgpt.h
@@ -72,13 +72,20 @@ int CheckValid(const struct drive *drive);
 #define GUID_STRLEN 37
 int StrToGuid(const char *str, Guid *guid);
 void GuidToStr(const Guid *guid, char *str, unsigned int buflen);
+int GuidEqual(const Guid *guid1, const Guid *guid2);
 int IsZero(const Guid *guid);
 
+/* Constant global type values to compare against */
+extern const Guid guid_chromeos_kernel;
+extern const Guid guid_chromeos_rootfs;
+extern const Guid guid_linux_data;
+extern const Guid guid_chromeos_reserved;
+extern const Guid guid_efi;
+extern const Guid guid_unused;
 
 int ReadPMBR(struct drive *drive);
 int WritePMBR(struct drive *drive);
 
-
 /* Convert possibly unterminated UTF16 string to UTF8.
  * Caller must prepare enough space for UTF8, which could be up to
  * twice the byte length of UTF16 string plus the terminating '\0'.
@@ -133,6 +140,7 @@ int cmd_create(int argc, char *argv[]);
 int cmd_add(int argc, char *argv[]);
 int cmd_boot(int argc, char *argv[]);
 int cmd_find(int argc, char *argv[]);
+int cmd_prioritize(int argc, char *argv[]);
 
 #define ARRAY_COUNT(array) (sizeof(array)/sizeof((array)[0]))
 const char *GptError(int errnum);