There were some fixes back on March 13th, 2014 for fixing compiling on MIPS64.
Also some fixes on June 25th, 2014 for SPARC64 fixes.
Probably more things, but those are what I care about.
I just removed Externals/polarssl/, added the new version, then deleted
the following files/directories:
DartConfiguration.tcl
Makefile
doxygen/
library/Makefile
programs/
scripts/
tests/
visualc/