Fix undefined references build error on Windows (x64) (#3168)

We should emit function symbols for these jerry-core functions:
- ecma_compare_ecma_strings is used by test-stringbuilder.c
- ecma_is_value_number is used by test-literal-storage.c
- ecma_date_time_within_day is used by test-date-helpers.c
- jmem_heap_alloc_block is used by test-jmem.c
- jmem_heap_free_block is used by test-jmem.c
- jmem_pools_alloc is used by test-poolman.c
- jmem_pools_free is used by test-poolman.c

JerryScript-DCO-1.0-Signed-off-by: Csaba Osztrogonác oszi@inf.u-szeged.hu

jerry-core/ecma/base/ecma-helpers-string.c

@@ -1760,7 +1760,7 @@ ecma_compare_ecma_strings_longpath (const ecma_string_t *string1_p, /**< ecma-st
  * @return true - if strings are equal;
  *         false - otherwise
  */
-inline bool JERRY_ATTR_ALWAYS_INLINE
+extern inline bool JERRY_ATTR_ALWAYS_INLINE
 ecma_compare_ecma_strings (const ecma_string_t *string1_p, /**< ecma-string */
                            const ecma_string_t *string2_p) /**< ecma-string */
 {

jerry-core/ecma/base/ecma-helpers-value.c

@@ -289,7 +289,7 @@ ecma_is_value_float_number (ecma_value_t value) /**< ecma value */
  * @return true - if the value contains ecma-number value,
  *         false - otherwise
  */
-inline bool JERRY_ATTR_CONST JERRY_ATTR_ALWAYS_INLINE
+extern inline bool JERRY_ATTR_CONST JERRY_ATTR_ALWAYS_INLINE
 ecma_is_value_number (ecma_value_t value) /**< ecma value */
 {
   return (ecma_is_value_integer_number (value)