Xtensa does not support thread_local. Disable it in absl/base/config.h.

PiperOrigin-RevId: 730515423
Change-Id: Ic5a5f0881bfc532f10da35a0e038875d587ac2b8

absl/base/config.h

diff --git a/absl/base/config.h b/absl/base/config.h
index 510c485..1bfad2a 100644
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -276,12 +276,10 @@
 
 // ABSL_HAVE_THREAD_LOCAL
 //
-// DEPRECATED - `thread_local` is available on all supported platforms.
-// Checks whether C++11's `thread_local` storage duration specifier is
-// supported.
+// Checks whether the `thread_local` storage duration specifier is supported.
 #ifdef ABSL_HAVE_THREAD_LOCAL
 #error ABSL_HAVE_THREAD_LOCAL cannot be directly set
-#else
+#elif !defined(__XTENSA__)
 #define ABSL_HAVE_THREAD_LOCAL 1
 #endif