package/libcurl: unbreak threads + c-ares conditional

Commit 0fce7a9623 ("package/libcurl: fix build w/ threads + c-ares") added a
conditional for threads + c-ares, but ended up with a end-parenthesis too
many - so the condition is never true.  Fix that.

Reported-by: Tibault Damman <tibault.damman@basalte.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libcurl/libcurl.mk

@@ -38,7 +38,7 @@ LIBCURL_IGNORE_CVES += CVE-2024-32928
 
 # threaded resolver cannot be used with c-ares
 # https://github.com/curl/curl/commit/d364f1347f05c53eea5d25a15b4ad8a62ecc85b8
-ifeq ($(BR2_TOOLCHAIN_HAS_THREADS)x$(BR2_PACKAGE_C_ARES)),yx)
+ifeq ($(BR2_TOOLCHAIN_HAS_THREADS)x$(BR2_PACKAGE_C_ARES),yx)
 LIBCURL_CONF_OPTS += --enable-threaded-resolver
 else
 LIBCURL_CONF_OPTS += --disable-threaded-resolver