curl: Fix header conflict with zblue slist.h

Add BEFORE keyword to target_include_directories to ensure curl's
slist.h takes precedence over zblue's slist.h, resolving compilation
errors with Curl_slist_append_nodup function.

bug: v/70561

Signed-off-by: v-yichenxi <v-yichenxi@xiaomi.com>

Author: EListenX

curl/CMakeLists.txt

@@ -87,7 +87,7 @@ if(CONFIG_LIB_CURL)
       curl)
   endif()
 
-  target_include_directories(curl PRIVATE ${CURL_INCDIR})
+  target_include_directories(curl BEFORE PRIVATE ${CURL_INCDIR})
   target_compile_options(curl PRIVATE ${CURL_FLAGS})
   target_sources(curl PRIVATE ${CURL_SRCS})