lcdproc: pull upstream fix for fno-common toolchains

Without the change build fails on upstream gcc-10 as:

    ld: iface.o:(.bss+0x0): multiple definition of `iface'; main.o:(.bss+0x60): first defined here

pkgs/servers/monitoring/lcdproc/default.nix

@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchpatch
 , autoreconfHook
 , makeWrapper
 , pkg-config
@@ -27,6 +28,14 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./hardcode_mtab.patch
+
+    # Pull upstream fix for -fno-common toolchains:
+    #   https://github.com/lcdproc/lcdproc/pull/148
+    (fetchpatch {
+      name = "fno-common.patch";
+      url = "https://github.com/lcdproc/lcdproc/commit/fda5302878692da933dc03cd011f8ddffefa07a4.patch";
+      sha256 = "0ld6p1r4rjsnjr63afw3lp5lx25jxjs07lsp9yc3q96r91r835cy";
+    })
   ];
 
   # we don't need to see the GPL every time we launch lcdd in the foreground