parser: introduce flb_strptime.h to the codebase
This actually introduces the portable strptime implementation into
the codebase.
This does not affect any platforms other than Windows, but you can
test it by setting FLB_SYSTEM_STRPTIME=Off at compile time.
#include <fluent-bit/flb_error.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_config.h>
+#include <fluent-bit/flb_strptime.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <time.h>
#include <limits.h>
#include <string.h>
