Fix Android.bp to Android.mk conversion bugs

Support + operators in Android.bp files
Remove trailing \n from list values in case they are part of an
expression
Replace manual $(LOCAL_PATH) prefixing in prependLocalPath with
a call to $(addprefix $(LOCAL_PATH),...) so it works on expressions.

Change-Id: I68a62b64381b7616fb7dc27fb064b1ffd3b4542a
1 file changed