crt: Add functions to api-ms-win-core-fibers for windowscoreheadless_apiset

Signed-off-by: Mark Harmstone <mark@harmstone.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
diff --git a/mingw-w64-crt/lib-common/api-ms-win-core-fibers-l2-1-0.def b/mingw-w64-crt/lib-common/api-ms-win-core-fibers-l2-1-0.def
index 18368fa..9e90974 100644
--- a/mingw-w64-crt/lib-common/api-ms-win-core-fibers-l2-1-0.def
+++ b/mingw-w64-crt/lib-common/api-ms-win-core-fibers-l2-1-0.def
@@ -3,5 +3,7 @@
 EXPORTS
 
 ConvertFiberToThread
+ConvertThreadToFiber
+CreateFiber
 DeleteFiber
 SwitchToFiber