cmake: emscripten platform cannot create shared libraries

Author: madebr

CMakeLists.txt

@@ -67,7 +67,7 @@ include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
 set(PLATFORM_SUPPORTS_SHARED ON)
-if(VITA OR PSP OR PS2 OR N3DS OR RISCOS)
+if(EMSCRIPTEN OR VITA OR PSP OR PS2 OR N3DS OR RISCOS)
     set(PLATFORM_SUPPORTS_SHARED OFF)
 endif()