remove the bit-field, use "pack" instead

JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang [email protected]

Author: jiangzidong

docs/09.EXT-REFERENCE-ARG.md

@@ -145,8 +145,8 @@ It will be passed into jerryx_arg_t's  extra_info filed.
 ```c
 typedef struct
 {
-  jerryx_arg_round_t round:2; /**< rounding policy */
-  jerryx_arg_clamp_t clamp:1; /**< clamping policy */
+  jerryx_arg_round_t round; /**< rounding policy */
+  jerryx_arg_clamp_t clamp; /**< clamping policy */
 } jerryx_arg_int_option_t;
 ```
 

jerry-ext/include/jerryscript-ext/arg.h

@@ -93,7 +93,7 @@ typedef enum
 /**
  * Indicates the rounding policy which will be choose to transform a integer.
  */
-typedef enum
+typedef enum __attribute__((packed))
 {
   JERRYX_ARG_ROUND, /**< round */
   JERRYX_ARG_FLOOR, /**< floor */
@@ -103,7 +103,7 @@ typedef enum
 /**
  * Indicates whether it will throw error when the integer's range is out of the target type.
  */
-typedef enum
+typedef enum __attribute__((packed))
 {
   JERRYX_ARG_CLAMP,/**< clamp the number when it is out of range */
   JERRYX_ARG_NO_CLAMP /**< throw a range error */
@@ -113,10 +113,10 @@ typedef enum
  * The structure indicates the options used to transform integer argument.
  * It will be passed into jerryx_arg_t's  extra_info filed.
  */
-typedef struct
+typedef struct __attribute__((packed))
 {
-  jerryx_arg_round_t round:2; /**< rounding policy */
-  jerryx_arg_clamp_t clamp:1; /**< clamping policy */
+  jerryx_arg_round_t round; /**< rounding policy */
+  jerryx_arg_clamp_t clamp; /**< clamping policy */
 } jerryx_arg_int_option_t;
 
 #define JERRYX_STATIC_ASSERT(x, msg) \