tools: patch: Fix build by not modifing Makefile.am

A new test case was adding in one of the patches fixing a problem, this
also included a change in the test/Makefile.am to add this test case.
The build system detected a change in the Makefile.am and wants to
regenerate the Makefile.in, but this fails because automake-1.15 is not
installed yet. As automake depends on patch being build first, make sure
we do not modify the Makefile.am.

This fixes build problem seen by the build bots.

Fixes: 4797dddfde ("patch: apply upstream cve fixes")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(backported from 759f111f8d)

tools/Makefile

@@ -66,7 +66,6 @@ $(curdir)/bc/compile := $(curdir)/bison/compile
 $(curdir)/findutils/compile := $(curdir)/bison/compile
 $(curdir)/gengetopt/compile := $(curdir)/libtool/compile
 $(curdir)/patchelf/compile := $(curdir)/libtool/compile
-$(curdir)/patch/compile := $(curdir)/automake/compile
 $(curdir)/dosfstools/compile := $(curdir)/autoconf/compile $(curdir)/automake/compile
 $(curdir)/libressl/compile := $(curdir)/pkg-config/compile
 $(curdir)/mkimage/compile += $(curdir)/libressl/compile

tools/patch/patches/010-CVE-2018-1000156.patch

@@ -143,57 +143,3 @@ instead of rejecting them and carrying on.
  
      if (ofp)
        {
---- a/tests/Makefile.am
-+++ b/tests/Makefile.am
-@@ -32,6 +32,7 @@ TESTS = \
- 	crlf-handling \
- 	dash-o-append \
- 	deep-directories \
-+	ed-style \
- 	empty-files \
- 	false-match \
- 	fifo \
---- /dev/null
-+++ b/tests/ed-style
-@@ -0,0 +1,41 @@
-+# Copyright (C) 2018 Free Software Foundation, Inc.
-+#
-+# Copying and distribution of this file, with or without modification,
-+# in any medium, are permitted without royalty provided the copyright
-+# notice and this notice are preserved.
-+
-+. $srcdir/test-lib.sh
-+
-+require cat
-+use_local_patch
-+use_tmpdir
-+
-+# ==============================================================
-+
-+cat > ed1.diff <<EOF
-+0a
-+foo
-+.
-+EOF
-+
-+check 'patch -e foo -i ed1.diff' <<EOF
-+EOF
-+
-+check 'cat foo' <<EOF
-+foo
-+EOF
-+
-+cat > ed2.diff <<EOF
-+1337a
-+r !echo bar
-+,p
-+EOF
-+
-+check 'patch -e foo -i ed2.diff 2> /dev/null || echo "Status: $?"' <<EOF
-+?
-+Status: 2
-+EOF
-+
-+check 'cat foo' <<EOF
-+foo
-+EOF