Add support for extracting input counts from bitcode files.

This patch adds functionality to the MetadataExtractor to calculate the number
of inputs that a kernel expects and store them in the
mExportForEachInputcountList member variable, accessable through
getExportForEachInputCountList().

Change-Id: I10516d15595cdc1f2301059619c29e62a05f3638
3 files changed