Revert commit 8441545d4f2afb9e9342e0dac378eafd03f00462

gcc/

2021-02-24  Matthias Klose  <doko@ubuntu.com>

	* Revert (PR target/98746 is fixed):

	2020-12-07  Matthias Klose  <doko@ubuntu.com>
	* genextract.c (print_header): Undefine ENABLE_RTL_CHECKING
	and ENABLE_RTL_FLAG_CHECKING.

Revert: "Don't build insn-extract.o with rtl checking"
    
This reverts commit 8441545d4f2afb9e9342e0dac378eafd03f00462.

