mingw: Update MinGW-w64 to 38c8142f660b6ba11e7c408f2de1e9f8bfaf839e.

[alexrp]

Closes #22040.

[alexrp]

I can't reproduce the aarch64-macos failures locally even with

diff --git a/test/standalone/coff_dwarf/build.zig b/test/standalone/coff_dwarf/build.zig
index 53425db8d3..891369f043 100644
--- a/test/standalone/coff_dwarf/build.zig
+++ b/test/standalone/coff_dwarf/build.zig
@@ -10,7 +10,7 @@ pub fn build(b: *std.Build) void {
     const target = if (builtin.os.tag == .windows)
         b.standardTargetOptions(.{})
     else
-        b.resolveTargetQuery(.{ .os_tag = .windows });
+        b.resolveTargetQuery(.{ .cpu_arch = .aarch64, .os_tag = .windows });
 
     const exe = b.addExecutable(.{
         .name = "main",

and zig build test in test/standalone/coff_dwarf.

🤷