Do not use AC_HEADER_MAJOR, include <sys/sysmacros.h> unconditionally

glibc, starting with commit glibc-2.24-28-gdbab657, has deprecated
inclusion of <sys/sysmacros.h> by <sys/types.h>.  The method used
for deprecation breaks AC_HEADER_MAJOR: this autoconf macro no longer
defines MAJOR_IN_SYSMACROS, which consequently breaks build.

Let's assume that all systems supported by strace provide major, minor,
and makedev macros via <sys/sysmacros.h>.

* configure.ac (AC_HEADER_MAJOR): Remove.
* mknod.c [MAJOR_IN_SYSMACROS, MAJOR_IN_MKDEV]: Remove.
Include <sys/sysmacros.h> unconditionally.
* print_struct_stat.c: Likewise.
* tests/mknod.c: Likewise.
* tests/mknodat.c: Likewise.
* tests/xstatx.c: Likewise.

configure.ac

@@ -284,7 +284,6 @@ AC_TYPE_SIGNAL
 AC_TYPE_UID_T
 
 AC_HEADER_DIRENT
-AC_HEADER_MAJOR
 AC_HEADER_STAT
 AC_HEADER_STDBOOL
 AC_HEADER_STDC

mknod.c

@@ -35,14 +35,7 @@
 
 #include <fcntl.h>
 #include <sys/stat.h>
-
-#ifdef MAJOR_IN_SYSMACROS
-# include <sys/sysmacros.h>
-#endif
-
-#ifdef MAJOR_IN_MKDEV
-# include <sys/mkdev.h>
-#endif
+#include <sys/sysmacros.h>
 
 static void
 decode_mknod(struct tcb *tcp, int offset)

print_struct_stat.c

@@ -34,12 +34,8 @@
 
 #include "defs.h"
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include "stat.h"
-#if defined MAJOR_IN_SYSMACROS
-# include <sys/sysmacros.h>
-#elif defined MAJOR_IN_MKDEV
-# include <sys/mkdev.h>
-#endif
 
 void
 print_struct_stat(struct tcb *tcp, const struct strace_stat *const st)

tests/mknod.c

@@ -5,15 +5,9 @@
 
 # include <stdio.h>
 # include <sys/stat.h>
+# include <sys/sysmacros.h>
 # include <unistd.h>
 
-# ifdef MAJOR_IN_SYSMACROS
-#  include <sys/sysmacros.h>
-# endif
-# ifdef MAJOR_IN_MKDEV
-#  include <sys/mkdev.h>
-# endif
-
 static const char sample[] = "mknod";
 
 static long

tests/mknodat.c

@@ -5,15 +5,9 @@
 
 # include <stdio.h>
 # include <sys/stat.h>
+# include <sys/sysmacros.h>
 # include <unistd.h>
 
-# ifdef MAJOR_IN_SYSMACROS
-#  include <sys/sysmacros.h>
-# endif
-# ifdef MAJOR_IN_MKDEV
-#  include <sys/mkdev.h>
-# endif
-
 static const char sample[] = "mknodat_sample";
 static const long int fd = (long int) 0xdeadbeefffffffff;
 

tests/xstatx.c

@@ -44,14 +44,7 @@
 # include <stddef.h>
 # include <time.h>
 # include <unistd.h>
-
-# if defined MAJOR_IN_SYSMACROS
-#  include <sys/sysmacros.h>
-# elif defined MAJOR_IN_MKDEV
-#  include <sys/mkdev.h>
-# else
-#  include <sys/types.h>
-# endif
+# include <sys/sysmacros.h>
 
 static void
 print_time(const time_t t)