ac: fix possible truncation of intrinsic name

Fixes the gcc warning:
snprintf’ output between 26 and 33 bytes into a destination of size 32

Fixes: d5f7ebda3e ("ac: add LLVM build functions for subgroup instrinsics")
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/common/ac_llvm_build.c

 ac_build_set_inactive(struct ac_llvm_context *ctx, LLVMValueRef src,
 		      LLVMValueRef inactive)
 {
-	char name[32], type[8];
+	char name[33], type[8];
 	LLVMTypeRef src_type = LLVMTypeOf(src);
 	src = ac_to_integer(ctx, src);
 	inactive = ac_to_integer(ctx, inactive);