[APITESTS][NTVDM][SPOOLSV] Add the missing ENABLE_EXPORTS property as these EXE targets have function exports.

This became a requirement, following a previous CMake update.
Otherwise the built EXEs would not export their intended functions.

Addendum to commit d8e92b5a (see PR #1335)
CORE-15406

[LOADCONFIG] The GCC rant had nothing to do with GCC, but everything with CMake...

[SPOOLSV] Add the missing exported stubs.

win32ss/printing/base/spoolsv/CMakeLists.txt

@@ -22,9 +22,18 @@ list(APPEND SOURCE
     rpcstubs.c
     spoolfile.c
     xcv.c
-    ${CMAKE_CURRENT_BINARY_DIR}/winspool_s.c)
+    ${CMAKE_CURRENT_BINARY_DIR}/winspool_s.c
+    ${CMAKE_CURRENT_BINARY_DIR}/spoolsv_stubs.c)
 
-add_executable(spoolsv ${SOURCE} spoolsv.rc)
+add_executable(spoolsv
+    ${SOURCE}
+    spoolsv.rc
+    ${CMAKE_CURRENT_BINARY_DIR}/spoolsv.def)
+
+set_target_properties(spoolsv
+    PROPERTIES
+    ENABLE_EXPORTS TRUE
+    DEFINE_SYMBOL "")
 
 if(USE_CLANG_CL)
     target_compile_options(spoolsv PRIVATE "-Wno-cast-calling-convention")