Global primitive definition macro uses incorrect designator order

[abelstuker]

The different def_glob macros for primitive global variables each use an incorrect designator order, not matching the declaration order in Global. This is the case for all platforms supporting primitive global installation.

#define def_glob(name, type, mut, init_value)             \
    StackValue name##_sv{.value_type = type, init_value}; \
    Global name = {                                       \
        .mutability = mut, .import_field = #name, .value = &name##_sv};

While the global struct is defined as:

typedef struct Global {
    char *export_name;    // export name of the global
    char *import_module;  // import module name
    char *import_field;   // import field name
    bool mutability;      // 0: immutable, 1: mutable
    StackValue *value;    // current value
} Global;

This results in a compiler error and breaks CI when the def_glob macro is used:

error: designator order for field ‘Global::import_field’ does not match declaration order in ‘Global’

The error was not catched in #329 since that PR didn't include any effective use of those primitive global variables.