Build windows 64bit binary using UCRT64 (#2832)

* Build windows 64bit binary using UCRT64

Is the default and recommended msystem setting. Will produce
binaries that are compatible with windows 10 and later.

Also run tests for 32bit build.

Related to #2831

* Use jq -b in tests/shtest

* Add Windows strptime

* Make Windows-optional tests not run on Windows again

---------

Co-authored-by: Nicolas Williams <nico@cryptonector.com>

src/builtin.c

@@ -43,6 +43,7 @@ void *alloca (size_t);
 #include "locfile.h"
 #include "jv_unicode.h"
 #include "jv_alloc.h"
+#include "util.h"
 
 
 #define BINOP(name) \
@@ -1417,25 +1418,6 @@ static void set_tm_yday(struct tm *tm) {
   tm->tm_yday = yday;
 }
 
-#ifndef HAVE_STRPTIME
-static char *strptime(const char *s, const char *format, struct tm *tm) {
-  if (strcmp(format, "%Y-%m-%dT%H:%M:%SZ"))
-    return NULL;
-
-  int count, end;
-  count = sscanf(s, "%d-%d-%dT%d:%d:%d%n",
-                    &tm->tm_year, &tm->tm_mon, &tm->tm_mday,
-                    &tm->tm_hour, &tm->tm_min, &tm->tm_sec,
-                    &end );
-  if (count == 6 && s[end] == 'Z') {
-    tm->tm_year -= 1900;
-    tm->tm_mon--;
-    return (char*)s + end + 1;
-  }
-  return NULL;
-}
-#endif
-
 static jv f_strptime(jq_state *jq, jv a, jv b) {
   if (jv_get_kind(a) != JV_KIND_STRING || jv_get_kind(b) != JV_KIND_STRING) {
     return ret_error2(a, b, jv_string("strptime/1 requires string inputs and arguments"));
@@ -1478,6 +1460,8 @@ static jv f_strptime(jq_state *jq, jv a, jv b) {
    */
   set_tm_wday(&tm);
   set_tm_yday(&tm);
+#elif defined(WIN32)
+  set_tm_wday(&tm);
 #else
   if (tm.tm_wday == 8 && tm.tm_mday != 0 && tm.tm_mon >= 0 && tm.tm_mon <= 11)
     set_tm_wday(&tm);