TinyCC: Support ENABLE_EXPORT property

Replace the default -Wl,--export-dynamic with -rdynamic.

Modules/Platform/Linux-TinyCC-C.cmake

@@ -2,3 +2,4 @@ set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "")
 set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP "")
 set(CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG "")
 set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-soname ")
+set(CMAKE_EXE_EXPORTS_C_FLAG "-rdynamic ")