Patch Abseil to verify compiler support for std::source_location.

PiperOrigin-RevId: 936018935
Change-Id: I2cabbdf497dbb67452c27fc5ed02c56e6884f3d4

cmake/abseil-cpp-source_location.patch

@@ -9,3 +9,15 @@ diff --git a/absl/base/options.h b/absl/base/options.h
 +#define ABSL_OPTION_USE_STD_SOURCE_LOCATION 0
  
  // ABSL_OPTION_USE_STD_ORDERING
+diff --git a/absl/base/config.h b/absl/base/config.h
+--- a/absl/base/config.h
++++ b/absl/base/config.h
+@@ -543,5 +543,7 @@
+ #ifdef __has_include
+ #if __has_include(<source_location>)
+-#define ABSL_HAVE_STD_SOURCE_LOCATION 1
++#if !defined(__clang__) || ABSL_HAVE_BUILTIN(__builtin_source_location)
++#define ABSL_HAVE_STD_SOURCE_LOCATION 1
++#endif
+ #endif
+ #else