uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/tools/database/shmig/default.nix

@@ -0,0 +1,43 @@
+{ stdenv, fetchFromGitHub
+, withMySQL ? true, withPSQL ? false, withSQLite ? false
+, mariadb, postgresql, sqlite, gawk, gnugrep, findutils, gnused
+, lib
+}:
+
+stdenv.mkDerivation rec {
+  pname = "shmig";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "mbucc";
+    repo = "shmig";
+    rev = "v${version}";
+    sha256 = "15ry1d51d6dlzzzhck2x57wrq48vs4n9pp20bv2sz6nk92fva5l5";
+  };
+
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  postPatch = ''
+    patchShebangs .
+
+    substituteInPlace shmig \
+      --replace "\`which mysql\`" "${lib.optionalString withMySQL "${mariadb.client}/bin/mysql"}" \
+      --replace "\`which psql\`" "${lib.optionalString withPSQL "${postgresql}/bin/psql"}" \
+      --replace "\`which sqlite3\`" "${lib.optionalString withSQLite "${sqlite}/bin/sqlite3"}" \
+      --replace "awk" "${gawk}/bin/awk" \
+      --replace "grep" "${gnugrep}/bin/grep" \
+      --replace "find" "${findutils}/bin/find" \
+      --replace "sed" "${gnused}/bin/sed"
+  '';
+
+  preBuild = ''
+    mkdir -p $out/bin
+  '';
+
+  meta = with lib; {
+    description = "Minimalistic database migration tool with MySQL, PostgreSQL and SQLite support";
+    homepage = "https://github.com/mbucc/shmig";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ ];
+  };
+}