rn: always reset the transform cache when starting the packager

It can help catch very weird bugs which are only triggered after a reset.

android/scripts/run-packager-helper.command

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+THIS_DIR=$(cd -P "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")")" && pwd)
+
+exec ${THIS_DIR}/../../node_modules/react-native/scripts/launchPackager.command --reset-cache

android/scripts/run-packager.sh

@@ -16,11 +16,10 @@ if nc -w 5 -z localhost ${RCT_METRO_PORT} ; then
     exit 2
   fi
 else
-    CMD="${THIS_DIR}/../../node_modules/react-native/scripts/launchPackager.command"
+    CMD="$THIS_DIR/run-packager-helper.command"
     if [[ `uname` == "Darwin"  ]]; then
         open -g "${CMD}" || echo "Can't start packager automatically"
     else
         xdg-open "${CMD}" || echo "Can't start packager automatically"
     fi
 fi
-

ios/scripts/run-packager-helper.command

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+THIS_DIR=$(cd -P "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")")" && pwd)
+
+exec ${THIS_DIR}/../../node_modules/react-native/scripts/launchPackager.command --reset-cache

ios/scripts/run-packager.sh

@@ -3,6 +3,8 @@
 # This script is executed from Xcode to start the React packager for Debug
 # targets.
 
+THIS_DIR=$(cd -P "$(dirname "$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")")" && pwd)
+
 export RCT_METRO_PORT="${RCT_METRO_PORT:=8081}"
 echo "export RCT_METRO_PORT=${RCT_METRO_PORT}" > "${SRCROOT}/../../node_modules/react-native/scripts/.packager.env"
 
@@ -13,7 +15,6 @@ if [[ "$CONFIGURATION" = "Debug" ]]; then
       exit 2
     fi
   else
-    open -g "$SRCROOT/../../node_modules/react-native/scripts/launchPackager.command" || echo "Can't start packager automatically"
+    open -g "$THIS_DIR/run-packager-helper.command" || echo "Can't start packager automatically"
   fi
 fi
-