curl.sh: add iphlpapi lib for c-ares [ci skip]

Should probably be done from `CMake/FindCares.cmake` in curl.

Fixes (in win-llvm):
```
ld.lld-19: error: undefined symbol: if_indextoname
>>> referenced by libcares.a(ares_getnameinfo.c.obj):(append_scopeid)
ld.lld-19: error: undefined symbol: GetUnicastIpAddressTable
>>> referenced by libcares.a(ares_addrinfo_localhost.c.obj):(ares_addrinfo_localhost)
ld.lld-19: error: undefined symbol: FreeMibTable
>>> referenced by libcares.a(ares_addrinfo_localhost.c.obj):(ares_addrinfo_localhost)
ld.lld-19: error: undefined symbol: CancelMibChangeNotify2
>>> referenced by libcares.a(ares_event_configchg.c.obj):(ares_event_configchg_destroy)
ld.lld-19: error: undefined symbol: NotifyIpInterfaceChange
>>> referenced by libcares.a(ares_event_configchg.c.obj):(ares_event_configchg_init)
ld.lld-19: error: undefined symbol: GetAdaptersAddresses
>>> referenced by libcares.a(ares_sysconfig_win.c.obj):(ares_init_sysconfig_windows)
ld.lld-19: error: undefined symbol: GetBestRoute2
>>> referenced by libcares.a(ares_sysconfig_win.c.obj):(ares_init_sysconfig_windows)
clang-19: error: linker command failed with exit code 1 (use -v to see invocation)
```
https://github.com/curl/curl-for-win/actions/runs/12969434245/job/36173450959#step:3:7385

Author: vszakats

curl.sh

@@ -307,6 +307,9 @@ _VER="$1"
     options+=" -DCARES_INCLUDE_DIR=${_TOP}/cares/${_PP}/include"
     options+=" -DCARES_LIBRARY=${_TOP}/cares/${_PP}/lib/libcares.a"
     CPPFLAGS+=' -DCARES_STATICLIB'
+    if [ "${_OS}" = 'win' ]; then
+      LIBS+=' -liphlpapi'
+    fi
   fi
   if [ "${_OS}" = 'mac' ]; then
     # GSS API deprecated in 2012-2013 (OS X 10.8 Mountain Lion / 10.9 Mavericks, iOS 7.0)