x86: Append -z cet-report=error to LDFLAGS

[hjl-tools]

Append -z cet-report=error to LDFLAGS if -fcf-protection is enabled by
default in compiler to catch the missing Intel CET marker:

compiling multi-threaded dynamic library 1.5.1
/usr/local/bin/ld: obj/conf_f408b4c825de923ffc88f7f21b6884b1/dynamic/huf_decompress_amd64.o: error: missing IBT and SHSTK properties
collect2: error: ld returned 1 exit status
...
LINK obj/conf_dbc0b41e36c44111bb0bb918e093d7c1/zstd
/usr/local/bin/ld: obj/conf_dbc0b41e36c44111bb0bb918e093d7c1/huf_decompress_amd64.o: error: missing IBT and SHSTK properties
collect2: error: ld returned 1 exit status

[felixhandte]

Great! Thanks for demonstrating this will catch missing CET support on an object.

However, we want commits to always build and pass tests (to make our lives easier if we have to bisect a problem). So after we merge #2992, it would be great if you could rebase this on top of that, so this will pass.

I'll accept and merge it then.

[hjl-tools]

Great! Thanks for demonstrating this will catch missing CET support on an object.

However, we want commits to always build and pass tests (to make our lives easier if we have to bisect a problem). So after we merge #2992, it would be great if you could rebase this on top of that, so this will pass.

I'll accept and merge it then.

Will do. Thanks.

[felixhandte]

@hjl-tools, please rebase this and then I will merge it.

[hjl-tools]

@hjl-tools, please rebase this and then I will merge it.

Done.