cmake: include zstd before curl

for some reason, even before this change, the build worked on my system,
both with clean and unclean builds. I don't understand cmake. Hopefully
this fixes the CI builds.

Author: szaszm

CMakeLists.txt

@@ -275,6 +275,11 @@ include(GetZLIB)
 get_zlib(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/zlib/dummy")
 
+# zstd
+include(GetZstd)
+get_zstd(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/zstd/dummy")
+
 # cURL
 include(GetLibCURL)
 get_curl(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})