pipe filenames through sort for consistent ordering

tool/browser_test.sh

 #!/bin/bash
 
 # Check that node exists and refers to nodejs
 checknodejs=$(hash node 2> /dev/null  && node --help | grep js)
 if [[ $? -ne 0 ]]; then
   echo 'NodeJS (node) is not properly installed'
   echo 'Note, on Ubuntu / Debian, you may need to also install:'
   echo '$ sudo apt-get install nodejs-legacy'
   exit 1
 fi
@@ skipping 15 matching lines @@
     if [[ $? -ne 0 ]]; then
       echo 'Chrome Canary is not found'
       echo 'Please install and/or set CHROME_CANARY_BIN to its path'
       exit 1
     else
       export CHROME_CANARY_BIN=google-chrome-unstable
     fi
   fi
 fi
 
-cat test/codegen/expect/language/*.js > test/codegen/expect/language-all.js
-cat test/codegen/expect/lib/typed_data/*.js > test/codegen/expect/lib-typed_data-all.js
+find test/codegen/expect/language/ -name "*.js" | sort | xargs cat > test/codegen/expect/language-all.js
+find test/codegen/expect/lib/typed_data/ -name "*.js" | sort | xargs cat > test/codegen/expect/lib-typed_data-all.js
 npm install
 npm test