Sync sh's procfs.h with glibc, fixes gdbserver.

Patch from Carmelo Amoroso <carmelo73@gmail.com>.

libc/sysdeps/linux/sh/sys/procfs.h

@@ -101,8 +101,8 @@ struct elf_prpsinfo
 typedef void *psaddr_t;
 
 /* Register sets.  Linux has different names.  */
-typedef gregset_t prgregset_t;
-typedef fpregset_t prfpregset_t;
+typedef elf_gregset_t prgregset_t;
+typedef elf_fpregset_t prfpregset_t;
 
 /* We don't have any differences between processes and threads,
    therefore habe only ine PID type.  */