enscript: avoid manually applying patches

This also fixes the LibraryPath, seems @TERMUX_PREFIX@ was not sed'ed
in it before.

packages/enscript/build.sh

@@ -3,13 +3,8 @@ TERMUX_PKG_DESCRIPTION="Enscript converts ASCII text files to PostScript, HTML,
 TERMUX_PKG_LICENSE="GPL-3.0"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION=1.6.6
-TERMUX_PKG_REVISION=11
+TERMUX_PKG_REVISION=12
 TERMUX_PKG_SRCURL=https://ftp.gnu.org/gnu/enscript/enscript-$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_SHA256=6d56bada6934d055b34b6c90399aa85975e66457ac5bf513427ae7fc77f5c0bb
 TERMUX_PKG_DEPENDS="cups, perl"
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS=" --sysconfdir=$TERMUX_PREFIX/etc/enscript"
-
-termux_step_post_make_install() {
-	cd "$TERMUX_PREFIX"/bin && patch -i "$TERMUX_PKG_BUILDER_DIR"/diffpp.patch.txt
-	cd "$TERMUX_PREFIX"/etc/enscript && patch -i "$TERMUX_PKG_BUILDER_DIR"/enscript.cfg.patch.txt
-}

packages/enscript/diffpp.in.patch

@@ -1,5 +1,5 @@
---- enscript-1.6.6/scripts/diffpp	2018-08-26 16:51:49.594000009 +0530
-+++ diffpp	2018-08-27 18:05:56.762000111 +0530
+--- ../diffpp.in.orig	2022-02-22 20:04:42.190819348 +0000
++++ ./scripts/diffpp.in	2022-02-22 20:05:18.550692024 +0000
 @@ -69,7 +69,7 @@
  open(FP, $file) || die "$program: couldn't open file `$file' for input: $!\n";
  @orig_file = <FP>;

packages/enscript/enscript.cfg.patch

@@ -1,5 +1,5 @@
---- enscript-1.6.6/lib/enscript.cfg	2018-08-27 22:11:45.300000097 +0530
-+++ enscript.cfg	2018-08-27 22:13:27.280000103 +0530
+--- ../enscript.cfg.in.orig	2022-02-22 20:02:37.744671349 +0000
++++ ./lib/enscript.cfg.in	2022-02-22 20:03:09.737858022 +0000
 @@ -76,7 +76,7 @@
  # HighlightBars: 2