Revert "Dont call npm before node is available"

This reverts commit 7ecb693.

This breaks Xcode build, see discussion on #5156

Author: Martin Konicek

packager/react-native-xcode.sh

@@ -29,6 +29,9 @@ cd ..
 set -x
 DEST=$CONFIGURATION_BUILD_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH
 
+# npm global install path may be a non-standard location
+PATH="$(npm prefix -g)/bin:$PATH"
+
 # Define NVM_DIR and source the nvm.sh setup script
 [ -z "$NVM_DIR" ] && export NVM_DIR="$HOME/.nvm"
 
@@ -43,9 +46,6 @@ if [[ -x "$HOME/.nodenv/bin/nodenv" ]]; then
   eval "$($HOME/.nodenv/bin/nodenv init -)"
 fi
 
-# npm global install path may be a non-standard location
-PATH="$(npm prefix -g)/bin:$PATH"
-
 react-native bundle \
   --entry-file index.ios.js \
   --platform ios \