Put the Build Phase setting of iOS when pod install.

[tihimsm]

I want to put the Build Phase setting of iOS when pod install.
https://firebase.google.com/docs/crashlytics/get-started?hl=ja#initialize-crashlytics

I think it's very good that this script is added automatically.
$ {PODS_ROOT} / FirebaseCrashlytics / run

But I also want to add Input Files.
${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}/Contents/Resources/DWARF/${TARGET_NAME}
$(SRCROOT)/$(BUILT_PRODUCTS_DIR)/$(INFOPLIST_PATH)

[mikehardy]

@tihimsm we will happily merge PRs 🙏