Add filesystem support to Emscripten config (#8483)

Enable filesystem support in Emscripten build configuration.

Author: ddgg-el

libs/openFrameworksCompiled/project/emscripten/config.emscripten.default.mk

@@ -135,6 +135,7 @@ PLATFORM_LDFLAGS += -s NO_DYNAMIC_EXECUTION=1
 PLATFORM_LDFLAGS += -s ALLOW_MEMORY_GROWTH=1
 PLATFORM_LDFLAGS += -sABORT_ON_WASM_EXCEPTIONS=0
 PLATFORM_LDFLAGS += -s DYNAMIC_EXECUTION=0 -s EMBIND_AOT=1
+PLATFORM_LDFLAGS += -s FILESYSTEM=1
 # PLATFORM_LDFLAGS += -s SINGLE_FILE=1
 #PLATFORM_LDFLAGS += -s MODULARIZE=1
 #PLATFORM_LDFLAGS += -s EVAL_CTORS=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1