Prepare to migrate ABSL_ATTRIBUTE_RETURNS_NONNULL to [[gnu::returns_nonnull]]

PiperOrigin-RevId: 1008373398

absl/log/internal/check_op.h

diff --git a/absl/log/internal/check_op.h b/absl/log/internal/check_op.h
index 69f0c3b..cf92beb 100644
--- a/absl/log/internal/check_op.h
+++ b/absl/log/internal/check_op.h
@@ -425,7 +425,7 @@
 
 // Build the error message string.  Specify no inlining for code size.
 template <typename T1, typename T2>
-ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_RETURNS_NONNULL const char* absl_nonnull
+ABSL_ATTRIBUTE_RETURNS_NONNULL ABSL_ATTRIBUTE_NOINLINE const char* absl_nonnull
 MakeCheckOpString(T1 v1, T2 v2, const char* absl_nonnull exprtext);
 
 template <typename T1, typename T2>