mission-center: fix libGL.so not found

pkgs/applications/misc/mission-center/default.nix

···
   ];
 
   postPatch = ''
+    substituteInPlace src/main.rs \
+      --replace "libGL.so.1" "${libGL}/lib/libGL.so.1"
+
     SRC_GATHERER=$NIX_BUILD_TOP/source/src/sys_info_v2/gatherer
     SRC_GATHERER_NVTOP=$SRC_GATHERER/3rdparty/nvtop