package/gnutls: add optional dependency on brotli, zlib, zstd

Version 3.7.4 added compression options with brotli, zlib and zstd.
These are automatically discovered, which makes their inclusion depend
on the build order. Therefore, explicitly enable/disable them.

Note that the configure help text says "--without-brotli" and
"--without-zstd", but the options are actually --without-libbrotli and
--without-libzstd. --without-zlib is correct in the help text.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 91354636e6a535be56990ffea78e483aad56ed05)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnutls/gnutls.mk

@@ -48,6 +48,13 @@ else
 GNUTLS_CONF_OPTS += --disable-openssl-compatibility
 endif
 
+ifeq ($(BR2_PACKAGE_BROTLI),y)
+GNUTLS_CONF_OPTS += --with-libbrotli
+GNUTLS_DEPENDENCIES += brotli
+else
+GNUTLS_CONF_OPTS += --without-libbrotli
+endif
+
 ifeq ($(BR2_PACKAGE_CRYPTODEV_LINUX),y)
 GNUTLS_CONF_OPTS += --enable-cryptodev
 GNUTLS_DEPENDENCIES += cryptodev-linux
@@ -73,6 +80,20 @@ else
 GNUTLS_CONF_OPTS += --with-included-unistring
 endif
 
+ifeq ($(BR2_PACKAGE_ZLIB),y)
+GNUTLS_CONF_OPTS += --with-zlib
+GNUTLS_DEPENDENCIES += zlib
+else
+GNUTLS_CONF_OPTS += --without-zlib
+endif
+
+ifeq ($(BR2_PACKAGE_ZSTD),y)
+GNUTLS_CONF_OPTS += --with-libzstd
+GNUTLS_DEPENDENCIES += zstd
+else
+GNUTLS_CONF_OPTS += --without-libzstd
+endif
+
 # Provide a default CA cert location
 ifeq ($(BR2_PACKAGE_P11_KIT),y)
 GNUTLS_CONF_OPTS += --with-default-trust-store-pkcs11=pkcs11:model=p11-kit-trust