Fix typing of __builtin_ia32_{pand,pandn,por,pxor}

Although https://gcc.gnu.org/onlinedocs/gcc/x86-Built-in-Functions.html
claims the types are di (long long), the actual uses im mmintrin.h are
1-element vectors in GCC, and Clang's BuiltinsX86.def confirms this.

Fixes: #6470

Author: tautschnig

src/ansi-c/gcc_builtin_headers_ia32.h

@@ -24,14 +24,10 @@ __gcc_v4hi __builtin_ia32_psubusw(__gcc_v4hi, __gcc_v4hi);
 __gcc_v4hi __builtin_ia32_pmullw(__gcc_v4hi, __gcc_v4hi);
 __gcc_v4hi __builtin_ia32_pmulhw(__gcc_v4hi, __gcc_v4hi);
 
-__gcc_v2si __builtin_ia32_pand(__gcc_v2si, __gcc_v2si); // maybe di
-__gcc_v2si __builtin_ia32_pandn(__gcc_v2si, __gcc_v2si); // maybe di
-__gcc_v2si __builtin_ia32_por(__gcc_v2si, __gcc_v2si); // maybe di
-__gcc_v2si __builtin_ia32_pxor(__gcc_v2si, __gcc_v2si); // maybe di
-//__gcc_di __builtin_ia32_pand(__gcc_di, __gcc_di);
-//__gcc_di __builtin_ia32_pandn(__gcc_di, __gcc_di);
-//__gcc_di __builtin_ia32_por(__gcc_di, __gcc_di);
-//__gcc_di __builtin_ia32_pxor(__gcc_di, __gcc_di);
+__gcc_v1di __builtin_ia32_pand(__gcc_v1di, __gcc_v1di);
+__gcc_v1di __builtin_ia32_pandn(__gcc_v1di, __gcc_v1di);
+__gcc_v1di __builtin_ia32_por(__gcc_v1di, __gcc_v1di);
+__gcc_v1di __builtin_ia32_pxor(__gcc_v1di, __gcc_v1di);
 
 __gcc_v8qi __builtin_ia32_pcmpeqb(__gcc_v8qi, __gcc_v8qi);
 __gcc_v4hi __builtin_ia32_pcmpeqw(__gcc_v4hi, __gcc_v4hi);