Ensure HAVE_GMP is reflected in emacs_config_features

* configure.ac: Move HAVE_GMP setting before emacs_config_features
setting (Bug#45771).

configure.ac

@@ -5657,6 +5657,12 @@ else
   ACL_SUMMARY=no
 fi
 
+if test -z "$GMP_H"; then
+  HAVE_GMP=yes
+else
+  HAVE_GMP=no
+fi
+
 emacs_standard_dirs='Standard dirs'
 AS_ECHO(["
 Configured for '${canonical}'.
@@ -5713,11 +5719,6 @@ done
 AC_DEFINE_UNQUOTED(EMACS_CONFIG_FEATURES, "${emacs_config_features}",
   [Summary of some of the main features enabled by configure.])
 
-if test -z "$GMP_H"; then
-  HAVE_GMP=yes
-else
-  HAVE_GMP=no
-fi
 AS_ECHO(["  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D}
   Does Emacs use -lXpm?                                   ${HAVE_XPM}
   Does Emacs use -ljpeg?                                  ${HAVE_JPEG}