Fix cross compilation issue for data process
Currently whenever trying to perform cross compilation on machines using different bitnesses you would come up with a failure during the "data" build such as:
It seems to lie in the Makefile located under icu4c/source/data/Makefile.in where, basically, the following is declared:
And all simply, nothing is declared on how to create this directory
The directory should be created if the Python tool is working, but in environments where Python is disabled, maybe the directory isn't made. Seems like a harmless change to make it in the normal Makefile.in.