* Make build scripts fully whitespace safe to the extend premitted by autotools
* Let all build scripts fail fast on error, previously they would continue and then fail with spurious follow-up errors burrowing the actual issue
* Ensure that all build scripts start with a valid shebang (`#!`)
* Fix jumbled letters in `android/build_build_app_x86.sh`
* `PATH` environment was: `export PATH="$PATH:$TCBINARIES:$TCINCLUDES/bin"`
* If system `libcurl-dev` (Debian) is installed its `curl-config` script will be first in `PATH`
* `./configure` will choose the system `curl-config` and fail to compile