fix windows

Author: Gioee

Makefile

@@ -246,7 +246,11 @@ $(CURL_LIB):
 	# --without-zsh-functions-dir \
 	# --without-libgsasl \
 	
+    ifeq ($(PLATFORM),windows)
+	msys2 "cd $(CURL_SRC) && make"
+    else
 	cd $(CURL_SRC) && make
+    endif
 
 	mkdir -p $(CURL_DIR)/$(PLATFORM)
 	mv $(CURL_SRC)/lib/.libs/libcurl.a $(CURL_DIR)/$(PLATFORM)