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/tools/backup/percona-xtrabackup/generic.nix

@@ -0,0 +1,63 @@
+{ lib, stdenv, fetchFromGitHub, bison, boost, cmake, makeWrapper, pkg-config
+, curl, cyrus_sasl, libaio, libedit, libev, libevent, libgcrypt, libgpg-error, lz4
+, ncurses, numactl, openssl, protobuf, valgrind, xxd, zlib
+, perlPackages
+, version, sha256, extraPatches ? [], extraPostInstall ? "", ...
+}:
+
+stdenv.mkDerivation rec {
+  pname = "percona-xtrabackup";
+  inherit version;
+
+  src = fetchFromGitHub {
+    owner = "percona";
+    repo = "percona-xtrabackup";
+    rev = "${pname}-${version}";
+    inherit sha256;
+  };
+
+  nativeBuildInputs = [ bison boost cmake makeWrapper pkg-config ];
+
+  buildInputs = [
+    curl cyrus_sasl libaio libedit libev libevent libgcrypt libgpg-error lz4
+    ncurses numactl openssl protobuf valgrind xxd zlib
+  ] ++ (with perlPackages; [ perl DBI DBDmysql ]);
+
+  patches = extraPatches;
+
+  # Workaround build failure on -fno-common toolchains:
+  #   ld: xbstream.c.o:(.bss+0x0): multiple definition of
+  #      `datasink_buffer'; ds_buffer.c.o:(.data.rel.local+0x0): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
+  cmakeFlags = [
+    "-DMYSQL_UNIX_ADDR=/run/mysqld/mysqld.sock"
+    "-DBUILD_CONFIG=xtrabackup_release"
+    "-DINSTALL_MYSQLTESTDIR=OFF"
+    "-DWITH_BOOST=system"
+    "-DWITH_CURL=system"
+    "-DWITH_EDITLINE=system"
+    "-DWITH_LIBEVENT=system"
+    "-DWITH_LZ4=system"
+    "-DWITH_PROTOBUF=system"
+    "-DWITH_SASL=system"
+    "-DWITH_SSL=system"
+    "-DWITH_ZLIB=system"
+    "-DWITH_VALGRIND=ON"
+    "-DWITH_MAN_PAGES=OFF"
+    "-DCMAKE_SKIP_BUILD_RPATH=OFF" # To run libmysql/libmysql_api_test during build.
+  ];
+
+  postInstall = ''
+    wrapProgram "$out"/bin/xtrabackup --prefix PERL5LIB : $PERL5LIB
+    rm -r "$out"/lib/plugin/debug
+  '' + extraPostInstall;
+
+  meta = with lib; {
+    description = "Non-blocking backup tool for MySQL";
+    homepage = "http://www.percona.com/software/percona-xtrabackup";
+    license = licenses.lgpl2;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ izorkin ];
+  };
+}