Revert "crt: Avoid best-fit mapping when constructing argv for main()"

This reverts commit 0d42217123d3aec0341b79f6d959c76e09648a1e.

Reference: https://sourceforge.net/p/mingw-w64/mailman/message/58840720/
Signed-off-by: LIU Hao <lh_mouse@126.com>