mummer4: patching to allow building with %gcc@13: (#38292)

Co-authored-by: LMS Bioinformatics <bioinformatics@lms.mrc.ac.uk>
Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

var/spack/repos/builtin/packages/mummer4/48bit_index.patch

@@ -0,0 +1,10 @@
+--- include/mummer/48bit_index.hpp	2020-10-01 01:47:50.000000000 +0100
++++ include/mummer/48bit_index.hpp.patched	2023-06-09 12:07:09.949856479 +0100
+@@ -6,6 +6,7 @@
+ #endif
+ 
++#include <cstdint>
+ #include "48bit_iterator.hpp"
+ 
+ template<typename IDX>
+ struct fortyeight_index {

var/spack/repos/builtin/packages/mummer4/package.py

@@ -25,3 +25,6 @@ class Mummer4(AutotoolsPackage):
     depends_on("perl@5.6.0:", type=("build", "run"))
     depends_on("awk", type="run")
     depends_on("sed", type="run")
+
+    # Adds missing inclusion of <cstdint>
+    patch("48bit_index.patch", level=0, when="%gcc@13:")