debootstrap: Depend on perl (fixes #1557)

Also mark the package as platform-independent as it only contains
scripts.

packages/debootstrap/build.sh

@@ -1,11 +1,13 @@
 TERMUX_PKG_HOMEPAGE=https://wiki.debian.org/Debootstrap
 TERMUX_PKG_DESCRIPTION="Bootstrap a basic Debian system"
 TERMUX_PKG_VERSION=1.0.91
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SHA256=65947fd131217867ce774c4b00d16d6d082da21751b4338cfe9270970fdbe011
 TERMUX_PKG_SRCURL=http://http.debian.net/debian/pool/main/d/debootstrap/debootstrap_${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_BUILD_IN_SRC=yes
-TERMUX_PKG_DEPENDS="wget, proot"
+TERMUX_PKG_DEPENDS="wget, proot, perl"
 TERMUX_PKG_MAINTAINER="Pierre Rudloff @Rudloff"
+TERMUX_PKG_PLATFORM_INDEPENDENT=yes
 
 termux_step_post_make_install() {
     mkdir -p ${TERMUX_PREFIX}/share/man/man8/