Mark builtins as hot sections using text section prefix in Windows.

This will places builtins in .text$hot code section that is generated by native compiler PGO

Change-Id: I9e66eea99fc9b25cda9d9a9d1f57a0cd43d3a924
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2628595
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72213}

src/snapshot/embedded/platform-embedded-file-writer-win.cc

@@ -566,8 +566,15 @@ int PlatformEmbeddedFileWriterWin::IndentedDataDirective(
 
 #else
 
+// The directives for text section prefix come from the COFF
+// (Common Object File Format) standards:
+// https://llvm.org/docs/Extensions.html
+//
+// .text$hot means this section contains hot code.
+// x means executable section.
+// r means read-only section.
 void PlatformEmbeddedFileWriterWin::SectionText() {
-  fprintf(fp_, ".section .text\n");
+  fprintf(fp_, ".section .text$hot,\"xr\"\n");
 }
 
 void PlatformEmbeddedFileWriterWin::SectionData() {