Add recipe for patch

recipes/patch/01-no-rlimit.patch

+diff -ru source/lib/getdtablesize.c source-new/lib/getdtablesize.c
+--- source/lib/getdtablesize.c	2015-03-06 16:31:45.000000000 -0800
++++ source-new/lib/getdtablesize.c	2017-08-08 19:33:33.993874985 -0700
+@@ -106,15 +106,6 @@
+ int
+ getdtablesize (void)
+ {
+-  struct rlimit lim;
+-
+-  if (getrlimit (RLIMIT_NOFILE, &lim) == 0
+-      && 0 <= lim.rlim_cur && lim.rlim_cur <= INT_MAX
+-      && lim.rlim_cur != RLIM_INFINITY
+-      && lim.rlim_cur != RLIM_SAVED_CUR
+-      && lim.rlim_cur != RLIM_SAVED_MAX)
+-    return lim.rlim_cur;
+-
+   return INT_MAX;
+ }
+ 
+Only in source-new/lib: getdtablesize.c.orig
+diff -ru source/src/safe.c source-new/src/safe.c
+--- source/src/safe.c	2015-03-06 16:34:20.000000000 -0800
++++ source-new/src/safe.c	2017-08-08 19:33:53.447430811 -0700
+@@ -92,11 +92,7 @@
+ 
+ static void init_dirfd_cache (void)
+ {
+-  struct rlimit nofile;
+-
+   max_cached_fds = 8;
+-  if (getrlimit (RLIMIT_NOFILE, &nofile) == 0)
+-    max_cached_fds = MAX (nofile.rlim_cur / 4, max_cached_fds);
+ 
+   cached_dirfds = hash_initialize (max_cached_fds,
+ 				   NULL,

recipes/patch/recipe.sh

+VERSION=2.7.5
+TAR=http://ftp.gnu.org/gnu/patch/patch-$VERSION.tar.xz
+
+function recipe_version {
+    echo "$VERSION"
+    skip=1
+}
+
+function recipe_update {
+    echo "skipping update"
+    skip=1
+}
+
+function recipe_build {
+    wget -O build-aux/config.sub http://git.savannah.gnu.org/cgit/config.git/plain/config.sub
+    autoreconf
+    ./configure --host=${HOST} --prefix=/
+    make
+    skip=1
+}
+
+function recipe_test {
+    echo "skipping test"
+    skip=1
+}
+
+function recipe_clean {
+    make clean
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    make DESTDIR="$dest" install
+    $HOST-strip $1/bin/*
+    rm -rf "$1/"{share,lib}
+    skip=1
+}