This adds the following signatures into altivec.h:

vector bool long long vec_mergee (vector bool long long, vector bool long long);

vector signed long long vec_mergee (vector signed long long, vector signed long long);

vector unsigned long long vec_mergee (vector unsigned long long, vector unsigned long long);

vector float vec_mergee (vector float, vector float);

vector double vec_mergee (vector double, vector double);

vector bool long long vec_mergeo (vector bool long long, vector bool long long);

vector signed long long vec_mergeo (vector signed long long, vector signed long long);

vector unsigned long long vec_mergeo (vector unsigned long long, vector unsigned long long);

vector double vec_mergeo (vector double, vector double);

vector float vec_mergeo (vector float, vector float);

vector unsigned short vec_pack_to_short_fp32 (vector float, vector float);

vector bool char vec_permxor (vector bool char, vector bool char, vector bool char);

vector unsigned char vec_permxor (vector signed char, vector signed char, vector signed char);

vector unsigned char vec_permxor (vector unsigned char, vector unsigned char, vector unsigned char);

vector unsigned int vec_rlmi (vector unsigned int, vector unsigned int, vector unsigned int);

vector unsigned long long vec_rlmi (vector unsigned long long, vector unsigned long long, vector unsigned long long);

vector unsigned int vec_rlnm (vector unsigned int, vector unsigned int, vector unsigned int);

vector double vec_unpackh (vector float);

vector double vec_unpackl (vector float);

vector float vec_pack (vector double, vector double);