However, the behavior of `#call` on the method object of
`local_variables` is not corrected.

Improve configuration guard

ref #4576 and ref #4947

* Need MRBAPI functions without `MRB_DISABLE_STDIO`:
  * mrbgems/mruby-bin-debugger
  * mrbgems/mruby-bin-mirb
  * mrbgems/mruby-bin-mrbc
  * mrbgems/mruby-bin-mruby
  * mrbgems/mruby-bin-strip
* Need `stdio.h`:
  * mrbgems/mruby-io
  * mrbgems/mruby-print
* Need `snprintf()` in `stdio.h`:
  * mrbgems/mruby-pack
  * mrbgems/mruby-sprintf

'stdio.h' is included in 'mruby.h' ('mrbconf.h').

However, keep 'stdio.h' used by mruby-test.

Some rule to CrossBuild Android

Fix the argument of `mrb_file_is_absolute_path()`.

Traditional, UNC, and Drive Path

Fix unfinished changes

Absolute path for windows

Enable MRB_METHOD_T_STRUCT by default on 32bit Windows

Because we can't use the highest 2 bits of function pointers.

Improving comments in the cross-compiling sample for the Sega Dreamcast.

Add CIFuzz action

Added example for cross-compiling for Sega Dreamcast (sh-elf).

Updated README.md - Fixed link to github issues

Thanks to @yujiyokoo for demonstrating mruby usage on Sega Dreamcast at RubyConf AU 2020!
See more here: https://youtu.be/ni-1x5Esa_o

Include time.h for ios

C++ is stricter in implicit type casting.

Differences from the PR #4940:
* Use simple search for short strings only.
* "short" means `m+n` is shorter than `MRB_QS_SHORT_STRING_LENGTH`.
* The current default value for `MRB_QS_SHORT_STRING_LENGTH` is 2048.

It is available by default in environments where `__unix__` is defined.
Other environments are enabled by defining `MRB_WITH_IO_PREAD_PWRITE`
(requires an implementation of `pread()` and `pwrite()` functions).

In any case, you can disable it by defining
`MRB_WITHOUT_IO_PREAD_PWRITE`.