Aim : I want to copy multiple txt files in /system ( of Android Device ) using Android.mk
My Findings :
We can copy file using two approach 1)
See the following example in Android font handling: https://android.googlesource.com/platform/frameworks/base/+/master/data/fonts/Android.mk#66
This creates a makefile function for a single font file, and uses a foreach loop to iterate over multiple files: https://android.googlesource.com/platform/frameworks/base/+/master/data/fonts/Android.mk#79
You can use any mechanism to populate font_src_files