Shiva Alpha v0.13

Finished the new Shiva Prelinker v2.0 (That's the "/usr/bin/shiva-ld" tool)
See ticket: #1
Performance enhancements of up to 3000% tested
Performance enhancement grows proportionate to size of .text section of executable
--disable-cfg-gen flag which disables the new control-flow meta-data from shiva-ld
Updated the Shiva user manual: documentation/shiva_user_manual.pdf to v0.12 Alpha.
Extended Shiva's shiva_analyze.c code to support consumption of .shiva.xref and .shiva.branch sections.
Several incidental build changes the patches in modules/aarch64_patches
Added a CHANGELOG