dialog: Try whiptail->dialog symlink (see #291)

packages/dialog/build.sh

@@ -2,6 +2,7 @@ TERMUX_PKG_DESCRIPTION="Application used in shell scripts which displays text us
 TERMUX_PKG_HOMEPAGE=http://invisible-island.net/dialog/
 TERMUX_PKG_DEPENDS="ncurses"
 TERMUX_PKG_VERSION="1.3-20160424"
+TERMUX_PKG_BUILD_REVISION=1
 TERMUX_PKG_SRCURL=http://invisible-island.net/datafiles/release/dialog.tar.gz
 # This will break when a new version is released (the URL unfortunately does not change)
 TERMUX_PKG_FOLDERNAME="dialog-$TERMUX_PKG_VERSION"
@@ -14,4 +15,6 @@ termux_step_pre_configure () {
 
 termux_step_post_make_install () {
 	rm $TERMUX_PREFIX/lib/libtinfo.so
+	cd $TERMUX_PREFIX/bin
+	ln -f -s dialog whiptail
 }