Now src contains exactly what's embedded in mongoose.c and .h, nothing more.
Added `tools/amalgam.sh` to aamlgamate both files at once.
There are no functional changes to mongoose.c, .h in this PR, only slight filename changes.
Go back to Ubuntu 16.04 and older gcc-arm (4.9.3).
Boot loader just won't run when compiled with newer GCC (7.x).
It's likely that it can be fixed with compile switches but I couldn't figure it out quickly, so going to just downgrade for now to get it back to workign state.
CL: CC3200: Fix boot loader regression
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