Follow-up refactoring of logging-related parts

This patch:
* Ensures that all calls to `jerry_port_log` in jerry-core happen
  via macros defined in jrt.h. Also, it unifies the names of those
  macros: as `JERRY_ERROR_MSG` and `JERRY_WARNING_MSG` gave a good
  pattern that was well aligned with the naming scheme of the log
  level enum, `JERRY_DLOG` and `JERRY_DDLOG` were rewritten to
  `JERRY_DEBUG_MSG` and `JERRY_TRACE_MSG`.
* Ensures that all debug logging code parts of jerry-core (i.e.,
  memory statistics, JS byte-code dumps, and RegExp byte-code
  dumps) are guarded by macros: `JMEM_STATS`,
  `PARSER_DUMP_BYTE_CODE`, and `REGEXP_DUMP_BYTE_CODE`, which in
  turn are controled by cmake build system feature flags
  `FEATURE_MEM_STATS`, `FEATURE_PARSER_DUMP`, and
  `FEATURE_REGEXP_DUMP`.
* Ensures that all debug logging functionalities can be controled
  during run time (provided that they were enabled during build
  time): the engine has `JERRY_INIT_MEM_STATS[_SEPARATE]`,
  `JERRY_INIT_SHOW_OPCODES`, `JERRY_INIT_SHOW_REGEXP_OPCODES` init
  flags, and the default unix/linux command line app has
  corresponding command line switches.`
* Drops `FEATURE_LOG`, `JERRY_ENABLE_LOG`, and
  `JERRY_INIT_ENABLE_LOG`, as their name was misleadingly general,
  even though they mostly controled the regexp engine only. The
  above-mentioned `*REGEXP*` things mostly act as their
  replacements.
* Updates build, test, and measurement tool scripts, and
  documentation.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-main/main-unix.c

@@ -111,6 +111,7 @@ print_help (char *name)
                       "  --mem-stats-separate\n"
                       "  --parse-only\n"
                       "  --show-opcodes\n"
+                      "  --show-regexp-opcodes\n"
                       "  --save-snapshot-for-global FILE\n"
                       "  --save-snapshot-for-eval FILE\n"
                       "  --exec-snapshot FILE\n"
@@ -187,6 +188,11 @@ main (int argc,
       flags |= JERRY_INIT_SHOW_OPCODES;
       jerry_port_default_set_log_level (JERRY_LOG_LEVEL_DEBUG);
     }
+    else if (!strcmp ("--show-regexp-opcodes", argv[i]))
+    {
+      flags |= JERRY_INIT_SHOW_REGEXP_OPCODES;
+      jerry_port_default_set_log_level (JERRY_LOG_LEVEL_DEBUG);
+    }
     else if (!strcmp ("--save-snapshot-for-global", argv[i])
              || !strcmp ("--save-snapshot-for-eval", argv[i]))
     {
@@ -237,10 +243,7 @@ main (int argc,
         return JERRY_STANDALONE_EXIT_CODE_FAIL;
       }
 
-#ifdef JERRY_ENABLE_LOG
-      flags |= JERRY_INIT_ENABLE_LOG;
       jerry_port_default_set_log_level (argv[i][0] - '0');
-#endif /* JERRY_ENABLE_LOG */
     }
     else if (!strcmp ("--abort-on-fail", argv[i]))
     {