CMake: fix build with `CURL_USE_GSSAPI`

CMAKE_*_LINKER_FLAGS must be a string but GSS_LINKER_FLAGS is a list, so
we need to replace semicolons with spaces when setting those.

Fixes #9017
Closes #1022

CMakeLists.txt

@@ -851,6 +851,7 @@ if(CURL_USE_GSSAPI)
     include_directories(${GSS_INCLUDE_DIR})
     link_directories(${GSS_LINK_DIRECTORIES})
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GSS_COMPILER_FLAGS}")
+    string(REPLACE ";" " " GSS_LINKER_FLAGS "${GSS_LINKER_FLAGS}")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${GSS_LINKER_FLAGS}")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${GSS_LINKER_FLAGS}")
     set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} ${GSS_LINKER_FLAGS}")