LLVM 17 std lib updates and fixes

* some manual fixes to generated CPU features code. in the future it
   would be nice to make the script do those automatically. I suspect
   the sm_90a thing is a bug in LLVM.
 * add liteos to various target OS switches. I know nothing about this
   OS; someone will need to work specifically on support for this OS
   when the time comes to support it properly in zig.
 * while waiting for the compiler, I went ahead and made more
   conservative choices about when to use `inline` in std/Target.zig

src/codegen/llvm.zig

@@ -148,6 +148,7 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
         .watchos => "watchos",
         .driverkit => "driverkit",
         .shadermodel => "shadermodel",
+        .liteos => "liteos",
         .opencl,
         .glsl450,
         .vulkan,
@@ -254,6 +255,7 @@ pub fn targetOs(os_tag: std.Target.Os.Tag) llvm.OSType {
         .emscripten => .Emscripten,
         .driverkit => .DriverKit,
         .shadermodel => .ShaderModel,
+        .liteos => .LiteOS,
     };
 }