include: Add some missing POSIX symbols to sys/syslimits.h

These symbols are included in the 2018 edition of the standard but
were missing from picolibc.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

newlib/libc/include/sys/syslimits.h

@@ -65,6 +65,7 @@
 #define _POSIX_ARG_MAX	        4096
 #define _POSIX_CHILD_MAX	6
 #define _POSIX_DELAYTIMER_MAX	32
+#define _POSIX_HOST_NAME_MAX    255
 #define _POSIX_LINK_MAX	        8
 #define _POSIX_LOGIN_NAME_MAX	9
 #define _POSIX_MAX_CANON	255
@@ -76,22 +77,31 @@
 #define _POSIX_OPEN_MAX	        16
 #define _POSIX_PATH_MAX	        255
 #define _POSIX_PIPE_BUF	        512
+#define _POSIX_RE_DUP_MAX       255
 #define _POSIX_RTSIG_MAX	8
 #define _POSIX_SEM_NSEMS_MAX	256
 #define _POSIX_SEM_VALUE_MAX	32767
 #define _POSIX_SIGQUEUE_MAX	32
 #define _POSIX_SSIZE_MAX	32767
+#define _POSIX_SS_REPL_MAX      4
 #define _POSIX_STREAM_MAX	8
+#define _POSIX_SYMLINK_MAX      255
+#define _POSIX_SYMLOOP_MAX      8
 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS	4
 #define _POSIX_THREAD_KEYS_MAX	128
 #define _POSIX_THREAD_THREADS_MAX	64
 #define _POSIX_TIMER_MAX	32
+#define _POSIX_TRACE_EVENT_NAME_MAX     30
+#define _POSIX_TRACE_NAME_MAX   8
+#define _POSIX_TRACE_SYS_MAX    8
+#define _POSIX_TRACE_USER_EVENT_MAX     32
 #define _POSIX_TTY_NAME_MAX	9
 #define _POSIX_TZNAME_MAX	3
 #define _POSIX2_BC_BASE_MAX	99
 #define _POSIX2_BC_DIM_MAX	2048
 #define _POSIX2_BC_SCALE_MAX	99
 #define _POSIX2_BC_STRING_MAX	1000
+#define _POSIX2_CHARCLASS_NAME_MAX      14
 #define _POSIX2_COLL_WEIGHTS_MAX	2
 #define _POSIX2_EXPR_NEST_MAX	32
 #define _POSIX2_LINE_MAX	2048