gnu: modem-manager: Fix build.

* gnu/packages/patches/modem-manager-fix-test-wrapper.patch: New file.
* gnu/packages/freedesktop.scm (modem-manager)[patches]: Use it here.
* gnu/local.mk (dist_patch_DATA): Register it here.

gnu/local.mk

@@ -1858,6 +1858,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/mpg321-CVE-2019-14247.patch		\
   %D%/packages/patches/mpg321-gcc-10.patch			\
   %D%/packages/patches/modglue-fix-build.patch		\
+  %D%/packages/patches/modem-manager-fix-test-wrapper.patch	\
   %D%/packages/patches/module-init-tools-moduledir.patch	\
   %D%/packages/patches/monero-use-system-miniupnpc.patch			\
   %D%/packages/patches/mono-1.2.6-bootstrap.patch		\

gnu/packages/freedesktop.scm

@@ -2149,6 +2149,7 @@ which speak the Qualcomm MSM Interface (QMI) protocol.")
         (git-reference
          (url "https://gitlab.freedesktop.org/mobile-broadband/ModemManager")
          (commit version)))
+       (patches (search-patches "modem-manager-fix-test-wrapper.patch"))
        (file-name (git-file-name name version))
        (sha256
         (base32

gnu/packages/patches/modem-manager-fix-test-wrapper.patch

@@ -0,0 +1,37 @@
+From daa829287894273879799a383ed4dc373c6111b0 Mon Sep 17 00:00:00 2001
+From: Alyssa Ross <hi@alyssa.is>
+Date: Wed, 8 May 2024 09:49:59 +0200
+Subject: [PATCH] build: prepend to LD_LIBRARY_PATH and GI_TYPELIB_PATH
+
+In Nixpkgs packages are installed in separate prefixes.
+Starting from GLib / gobject-introspection 2.80, GLib introspection data
+is provided by GLib itself instead of gobject-introspection. This causes
+tests failures in Nixpkgs because the GI_TYPELIB_PATH set by the build
+environment was overridden, leaving it unable to find GLib:
+
+	    ImportError: cannot import name GLib, introspection typelib not found
+
+Only GI_TYPELIB_PATH needs to be preserved in our case, but I've made
+the same change for LD_LIBRARY_PATH, other environments might rely on
+that in a similar way.
+---
+ tools/tests/test-wrapper.sh.in | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/tools/tests/test-wrapper.sh.in b/tools/tests/test-wrapper.sh.in
+index fb8cd5e8d5..d6484bed60 100755
+--- a/tools/tests/test-wrapper.sh.in
++++ b/tools/tests/test-wrapper.sh.in
+@@ -1,5 +1,8 @@
+ #!/bin/sh
+ 
++export LD_LIBRARY_PATH=@abs_top_builddir@/libmm-glib"${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}"
++export GI_TYPELIB_PATH=@abs_top_builddir@/libmm-glib"${GI_TYPELIB_PATH+:$GI_TYPELIB_PATH}"
++
+ # For debugging behavior of test-modemmanager-service.py, you can modify
+ # this line to add --log-file option
+-LD_LIBRARY_PATH=@abs_top_builddir@/libmm-glib GI_TYPELIB_PATH=@abs_top_builddir@/libmm-glib @abs_top_srcdir@/tools/test-modemmanager-service.py
++exec @abs_top_srcdir@/tools/test-modemmanager-service.py
+-- 
+GitLab
+