cmake: assume emcmake in path when using emsdk

Author: NeroBurner

CMakeLists.txt

@@ -192,7 +192,7 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 # Special case for SDL2 dependency, goal is to find a config that exports SDL2::SDL2 target
 # libsdl2-dev has a `sdl2-config.cmake` that doesn't export this, but vcpkg does..
 if(${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
-  # /usr/lib/emscripten/emcmake cmake -S . -B _build_em
+  # emcmake cmake -S . -B _build_em
   set(USE_FLAGS "-s USE_PTHREADS=1 -pthread")
   set(USE_FLAGS "${USE_FLAGS} -s USE_SDL=2")
   set(USE_FLAGS "${USE_FLAGS} -fwasm-exceptions")