Fix instructions.

Author: jkakar

README.md

@@ -10,17 +10,17 @@ to generate Elixir code.  Code is generated by running the `generate.exs`
 script for Elixir:
 
 ```
-SPEC_PATH=../../awslabs/aws-sdk-go/apis \
-TEMPLATE_PATH=priv \
-OUTPUT_PATH=../aws-elixir/lib/aws \
+export SPEC_PATH=../../awslabs/aws-sdk-go/models/apis
+export TEMPLATE_PATH=priv
+export OUTPUT_PATH=../aws-elixir/lib/aws
 mix run generate.exs elixir $SPEC_PATH $TEMPLATE_PATH $OUTPUT_PATH
 ```
 
 and for Erlang:
 
 ```
-SPEC_PATH=../../awslabs/aws-sdk-go/apis \
-TEMPLATE_PATH=priv \
-OUTPUT_PATH=../aws-erlang/src \
+export SPEC_PATH=../../awslabs/aws-sdk-go/models/apis
+export TEMPLATE_PATH=priv
+export OUTPUT_PATH=../aws-erlang/src
 mix run generate.exs erlang $SPEC_PATH $TEMPLATE_PATH $OUTPUT_PATH
 ```