Several fixes included, they should be documented in the code.

Notable Changes:

• a code patching system
  • only used to fix openssl old linux OS's(GLIBC <= 2.25) for now but can be expanded in the future if necessary
• openssl configure and build support for linux
  • notably there is a flag passed here to hide all openssl symbols, without this, nodegit would segfault in cases where the electron environment has loaded in openssl
• Apparently we were building and shipping some node binaries without code in them, this was an artifact of making action-only targets but not declaring them as action-only. I fixed that.
• Also configured openssl on linux and mac to only build and install the headers and libs. we no longer build the additional apps, fuzzers, and docs. should result in a small speed up