Fix error in util.c causing clang++ build-time failure

As suggested by Leon Timmermans in
#19515.

Same problem detected in hv.c.

Pull request:  #19516

Author: jkeenan

hv.c

@@ -77,11 +77,11 @@ STMT_START {                                                            \
     XORSHIFT_RAND_BITS(PL_hash_rand_bits);                              \
     if (DEBUG_HASH_RAND_BITS) {                                         \
         PerlIO_printf( Perl_debug_log,                                  \
-            "PL_hash_rand_bits=%016"UVxf" @ %s:%-4d",                   \
+            "PL_hash_rand_bits=%016" UVxf" @ %s:%-4d",                   \
             (UV)PL_hash_rand_bits, __FILE__, __LINE__                   \
         );                                                              \
         if (DEBUG_v_TEST && key) {                                      \
-            PerlIO_printf( Perl_debug_log, " key:'%.*s' %"UVuf"\n",     \
+            PerlIO_printf( Perl_debug_log, " key:'%.*s' %" UVuf"\n",     \
                     (int)klen,                                          \
                     key ? key : "", /* silence warning */               \
                     (UV)klen                                            \

util.c

@@ -5076,7 +5076,7 @@ Perl_debug_hash_seed(pTHX_ bool via_debug_h)
                                                    : "DETERMINISTIC");
             if (DEBUG_h_TEST)
                 PerlIO_printf(Perl_debug_log,
-                        " RAND_BITS=0x%"UVxf, PL_hash_rand_bits);
+                        " RAND_BITS=0x%" UVxf, PL_hash_rand_bits);
 #endif
             PerlIO_printf(Perl_debug_log, "\n");
         }