testing/gf2x: fix build with gcc 15

testing/gf2x/APKBUILD

@@ -12,14 +12,14 @@ makedepends="autoconf automake libtool"
 subpackages="$pkgname-dev"
 source="https://gitlab.inria.fr/gf2x/gf2x/-/archive/gf2x-$pkgver/gf2x-gf2x-$pkgver.tar.bz2
 	gcc14.patch
+	gcc15.patch
 	"
 builddir="$srcdir/$pkgname-$pkgname-$pkgver"
 
 prepare() {
 	default_prepare
-	update_config_guess
-	update_config_sub
-	autoreconf -i
+
+	autoreconf -fvi
 }
 
 build() {
@@ -45,4 +45,5 @@ package() {
 sha512sums="
 2872d8ddeb1fd3966f8711573d6c090975fcd9acfa302f7537ebfa3350e83af224bfd18a33ea1106d81ab900c96413e413c04ba506d8bf928bb92b670c24d857  gf2x-gf2x-1.3.0.tar.bz2
 2ca5c8c22eedda1b2e0d39927de922ccc152b924ae4e140f147a7883386cc65ef57fc369b246ed6d8ae6fc52d118554a1b7ee1a04385fd2e956aef3ae668b345  gcc14.patch
+348f5ca844ea004939a6703ee9f059e5c77ec16af8f34e38357bedfed03f51c0023f8d3ec8bd3e18a1118efa6a0f44165779a336852852c0d0eeb409f1223bd1  gcc15.patch
 "

testing/gf2x/gcc15.patch

@@ -0,0 +1,18 @@
+--- a/config/acinclude.m4
++++ b/config/acinclude.m4
+@@ -664,6 +664,7 @@ cat >conftest.c <<EOF
+ int
+ main ()
+ {
++  #include <stdlib.h>
+   exit(0);
+ }
+ EOF
+@@ -702,6 +703,7 @@ AC_CACHE_CHECK([for build system executable suffix],
+ int
+ main ()
+ {
++  #include <stdlib.h>
+   exit (0);
+ }
+ EOF