Flatten the libbcc directories.

Get rid of the Support, Core, and RenderScript subdirectories for
the sources and the header files.

Deleted the unused Sha1 header file.

Bug: 34265954
Test: Compiled everything, ran a regular and a support lib app.
Change-Id: Iac760ee3c1985259593e7bbd1dd2dd35e99f654b
52 files changed