Update Makefile paths to use emscripten upstream

Note that emscripten upstream branch implements the new asyncify implementation, expected to be faster than emterpreter one.

examples/Makefile

@@ -116,8 +116,8 @@ endif
 ifeq ($(PLATFORM),PLATFORM_WEB)
     # Emscripten required variables
     EMSDK_PATH         ?= C:/emsdk
-    EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/fastcomp/emscripten
-    CLANG_PATH          = $(EMSDK_PATH)/fastcomp/bin
+    EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/upstream/emscripten
+    CLANG_PATH          = $(EMSDK_PATH)/upstream/bin
     PYTHON_PATH         = $(EMSDK_PATH)/python/2.7.13.1_64bit/python-2.7.13.amd64
     NODE_PATH           = $(EMSDK_PATH)/node/12.9.1_64bit/bin
     export PATH         = $(EMSDK_PATH);$(EMSCRIPTEN_PATH);$(CLANG_PATH);$(NODE_PATH);$(PYTHON_PATH);C:\raylib\MinGW\bin:$$(PATH)
@@ -196,7 +196,7 @@ ifeq ($(BUILD_MODE),DEBUG)
     endif
 else
     ifeq ($(PLATFORM),PLATFORM_WEB)
-        CFLAGS += -Os
+        CFLAGS += -O3
     else
         CFLAGS += -s -O1
     endif
@@ -233,7 +233,7 @@ ifeq ($(PLATFORM),PLATFORM_WEB)
     # --profiling                # include information for code profiling
     # --memory-init-file 0       # to avoid an external memory initialization code file (.mem)
     # --preload-file resources   # specify a resources folder for data compilation
-    CFLAGS += -s USE_GLFW=3 -s FORCE_FILESYSTEM=1 -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1 --preload-file $(dir $<)resources@resources
+    CFLAGS += -s USE_GLFW=3 -s FORCE_FILESYSTEM=1 -s ASYNCIFY --preload-file $(dir $<)resources@resources
 
     # NOTE: Simple raylib examples are compiled to be interpreter by emterpreter, that way,
     # we can compile same code for ALL platforms with no change required, but, working on bigger

src/Makefile

@@ -148,8 +148,8 @@ endif
 ifeq ($(PLATFORM),PLATFORM_WEB)
     # Emscripten required variables
     EMSDK_PATH         ?= C:/emsdk
-    EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/fastcomp/emscripten
-    CLANG_PATH          = $(EMSDK_PATH)/fastcomp/bin
+    EMSCRIPTEN_PATH    ?= $(EMSDK_PATH)/upstream/emscripten
+    CLANG_PATH          = $(EMSDK_PATH)/upstream/bin
     PYTHON_PATH         = $(EMSDK_PATH)/python/2.7.13.1_64bit/python-2.7.13.amd64
     NODE_PATH           = $(EMSDK_PATH)/node/12.9.1_64bit/bin
     export PATH         = $(EMSDK_PATH);$(EMSCRIPTEN_PATH);$(CLANG_PATH);$(NODE_PATH);$(PYTHON_PATH);C:\raylib\MinGW\bin:$$(PATH)