Rework usages/naming of configuration macros [part 1] (#2793)

There are quite a few configuration macros in the project.
As discussed in the #2520 issue there are a few awkward constructs.

Main changes:

* Renamed all CONFIG_DISABLE_<name>_BUILTIN macro to JERRY_BUILTIN_<name> format.
* The special JERRY_BUILTINS macro specifies the basic config for all es5.1 builtins.
* Renamed all CONFIG_DISABLE_ES2015_<name> to JERRY_ES2015_<name> format.
* The special JERRY_ES2015 macro specifies the basic config for all es2015 builtins.
* Renamed UNICODE_CASE_CONVERSION to JERRY_UNICODE_CASE_CONVERSION.
* Renamed ENABLE_REGEXP_STRICT_MODE to JERRY_REGEXP_STRICT_MODE.
* All options (in this change) can have a value of 0 or 1.
* Renamed ENABLE_REGEXP_STRICT_MODE to JERRY_REGEXP_STRICT_MODE.
  JERRY_REGEXP_STRICT_MODE is set to 0 by default.
* Reworked CONFIG_ECMA_NUMBER_TYPE macro to JERRY_NUMBER_TYPE_FLOAT64 name and now
  it uses the value 1 for 64 bit floating point numbers and 0 for 32 bit floating point
  number.
  By default the 64-bit floating point number mode is enabled.
* All new JERRY_ defines can be used wit the `#if ENABLED (JERRY_...)` construct to
  test if the feature is enabled or not.
* Added/replaced a few config.h includes to correctly propagate the macro values.
* Added sanity checks for each macro to avoid incorrectly set values.
* Updated profile documentation.
* The CMake feature names are not updated at this point.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

jerry-core/ecma/builtin-objects/ecma-builtin-helpers-json.c

@@ -18,7 +18,7 @@
 #include "ecma-builtin-helpers.h"
 #include "lit-char-helpers.h"
 
-#ifndef CONFIG_DISABLE_JSON_BUILTIN
+#if ENABLED (JERRY_BUILTIN_JSON)
 
 /** \addtogroup ecma ECMA
  * @{
@@ -223,7 +223,7 @@ ecma_builtin_helper_json_create_non_formatted_json (lit_utf8_byte_t left_bracket
   return ecma_make_string_value (result_str_p);
 } /* ecma_builtin_helper_json_create_non_formatted_json */
 
-#endif /* !CONFIG_DISABLE_JSON_BUILTIN */
+#endif /* ENABLED (JERRY_BUILTIN_JSON) */
 
 /**
  * @}