cmake: Fix curl build for Windows

Externals/curl/lib/CMakeLists.txt

@@ -1,6 +1,7 @@
-set(LIB_NAME libcurl)
+if(NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
+  add_definitions(-DHAVE_CONFIG_H)
+endif()
 
-add_definitions(-DHAVE_CONFIG_H)
 include_directories(.)
 
 file(GLOB SRCS *.c vauth/*.c vtls/*.c)
@@ -11,3 +12,4 @@ add_library(
   )
 
 target_link_libraries(curl ${MBEDTLS_LIBRARIES})
+target_compile_definitions(curl PUBLIC CURL_STATICLIB PRIVATE CURL_DISABLE_LDAP)