jpeg-archive: add -fcommon workaround

Workaround build failure on -fno-common toolchains like upstream
gcc-10. Otherwise build fails as:

    ld: src/util.o:(.bss+0x0): multiple definition of `progname'; /build/ccBZT2Za.o:(.bss+0x20): first defined here

pkgs/applications/graphics/jpeg-archive/default.nix

@@ -21,6 +21,12 @@ stdenv.mkDerivation {
     substituteInPlace Makefile --replace 'LIBJPEG =' 'LIBJPEG ?='
   '';
 
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: src/util.o:(.bss+0x0): multiple definition of `progname'; /build/ccBZT2Za.o:(.bss+0x20): first defined here
+  # https://github.com/danielgtaylor/jpeg-archive/issues/119
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   makeFlags = [
     "CC=${stdenv.cc.targetPrefix}cc"
     "PREFIX=$(out)"