[Bazel] Don't set HAVE_[DE]REGISTER_FRAME on Windows

[GMNGeoffrey]

Summary

This is also done based on OS in the GN build
(https://github.com/llvm/llvm-project/blob/24b0df8686/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn#L193-L203).
Of course the right way would be to set up platform detection, but that
remains TODO.

utils/bazel/llvm-project-overlay/llvm/config.bzl

posix_defines = [
     "LLVM_ENABLE_THREADS=1",
     "HAVE_SYSEXITS_H=1",
     "HAVE_UNISTD_H=1",
     "HAVE_STRERROR_R=1",
     "HAVE_LIBPTHREAD=1",
     "HAVE_PTHREAD_GETNAME_NP=1",
     "HAVE_PTHREAD_SETNAME_NP=1",
     "HAVE_PTHREAD_GETSPECIFIC=1",
+    "HAVE_REGISTER_FRAME=1",
+    "HAVE_DEREGISTER_FRAME=1",
 ]
 
 linux_defines = posix_defines + [
     "_GNU_SOURCE",
     "HAVE_LINK_H=1",
     "HAVE_LSEEK64=1",
     "HAVE_MALLINFO=1",
     "HAVE_POSIX_FALLOCATE=1",

utils/bazel/llvm-project-overlay/llvm/include/llvm/Config/config.h

 
 /* Define if dlopen() is available on this platform. */
 #define HAVE_DLOPEN 1
 
 /* Define if dladdr() is available on this platform. */
 /* #undef HAVE_DLADDR */
 
 /* Define to 1 if we can register EH frames on this platform. */
-#define HAVE_REGISTER_FRAME 1
+/* HAVE_REGISTER_FRAME defined in Bazel*/
 
 /* Define to 1 if we can deregister EH frames on this platform. */
-#define HAVE_DEREGISTER_FRAME 1
+/* HAVE_DEREGISTER_FRAME defined in Bazel*/
 
 /* Define if __unw_add_dynamic_fde() is available on this platform. */
 /* HAVE_UNW_ADD_DYNAMIC_FDE defined in Bazel */
 
 /* Define to 1 if you have the <errno.h> header file. */
 #define HAVE_ERRNO_H 1
 
 /* Define to 1 if you have the <fcntl.h> header file. */