main/xmprpc-c: fix build with gcc 15

Patch from SVN revision 3318

main/xmlrpc-c/APKBUILD

@@ -20,6 +20,7 @@ subpackages="
 	"
 source="https://downloads.sourceforge.net/project/xmlrpc-c/Xmlrpc-c%20Super%20Stable/$pkgver/xmlrpc-$pkgver.tgz
 	format-security.patch
+	gcc15.patch
 	"
 builddir="$srcdir/xmlrpc-$pkgver"
 options="!check"
@@ -86,4 +87,5 @@ abyss() {
 sha512sums="
 df0d8e3730b529fb10fb2cf9511dc55143ad3c7b4cce5522b61ed0d212080f3ebf4b6aa8a28911ddbe90029fce6bea7df28ee51f36196900a855beff5bd3a1cd  xmlrpc-1.51.08.tgz
 a47333110b84c530dc362104d5a9d99ae192a9db4c68fe536b98bfef0c076ff119162e4b6fec65ec98d9d5ccbcab32d5169db4d82a6e0fa080c89e9ff8f0cfef  format-security.patch
+f3c607d796c9bb5f1fd06dbb0ccfa44336b096dbd8c2aba503cadf35a1b94d1e66824c5c9fa8ca80c32940ce95ae2bf5677cbf58d2c42cb61a15b9abf00a2f8e  gcc15.patch
 "

main/xmlrpc-c/gcc15.patch

@@ -0,0 +1,15 @@
+--- a/lib/util/include/bool.h
++++ b/lib/util/include/bool.h
+@@ -5,7 +5,11 @@
+    collision.
+ */
+ 
+-#ifndef __cplusplus
++#ifdef __cplusplus
++/* bool has always been part of the C++ language */
++#elif __STDC_VERSION__ >= 202311L
++/* bool is part of the C23 standard */
++#else
+ /* At least the GNU compiler defines __bool_true_false_are_defined */
+ #ifndef __bool_true_false_are_defined
+ #define __bool_true_false_are_defined