fix(main/patch): add missing license file symlink

`../../LICENSES/GPL-2.0.txt←./share/doc/patch/LICENSE`

packages/patch/build.sh

@@ -3,7 +3,7 @@ TERMUX_PKG_DESCRIPTION="GNU patch which applies diff files to create patched fil
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION=2.7.6
-TERMUX_PKG_REVISION=3
+TERMUX_PKG_REVISION=4
 TERMUX_PKG_SRCURL=https://mirrors.kernel.org/gnu/patch/patch-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=ac610bda97abe0d9f6b7c963255a11dcb196c25e337c61f94e4778d632f1d8fd
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-xattr ac_cv_path_ED=$TERMUX_PREFIX/bin/ed"