k-hashv32, k-hashv64: fix arm builds, including macos-14-arm64

Verification value 0x9FBDD2B1 for k-hashv32 and 0x70E67C61 for k-hashv64
signal, that the has was not properly seeded. Currently, k-hashv32
and k-hashv64 are compiled depending on HAVE_KHASHV from CMakeLists.txt,
so initialization should be done depending on same macro as well.

See rurban#294

main.cpp

@@ -939,10 +939,10 @@ bool Hash_Seed_init (pfHash hash, size_t seed) {
   else if(hash == hashx_test)
     hashx_seed_init(info, seed);
   */
-# ifdef HAVE_KHASHV
+#endif
+#ifdef HAVE_KHASHV
   else if(hash == khashv64_test || hash == khashv32_test)
     khashv_seed_init(seed);
-# endif
 #endif
   else if(hash == polymur_test)
     polymur_seed_init(seed);