cmake: fix HAVE_GETHOSTBYNAME_R_* detections with CURL_WERROR=ON
#16282
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To sync with autotools, which has it enabled by default.
```
/cygdrive/d/a/curl/curl/CMake/CurlTests.c:73:19: error: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
73 | char *address = "example.com";
| ^~~~~~~~~~~~~
```
https://github.com/curl/curl/actions/runs/13226709122/job/36921488213?pr=16278#step:7:3941
vszakats
changed the title
CURL_WERROR for CMakeHAVE_GETHOSTBYNAME_R_* detections with CURL_WERROR=ON
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Fix
HAVE_GETHOSTBYNAME_R_*feature detections always failing withCURL_WERROR=ONdue to stripping a const.Also fix the GHA/cmake-vs-configure to enable
CURL_WERROR=ONto syncthis setting with
./configurewhich enables it by default. With that,CI detects this issue.
Ref: https://github.com/curl/curl/actions/runs/13225827821/job/36916564107#step:33:4198