Enable strdupa() for this project, build ip_bond*.c.

We don't want to _encourage_ strdupa(), so we've never added it to
bionic, but it's a trivial -D in cflags for anyone who wants it for
glibc code. I've added it to the top-level .bp file so that any future
uses in this project will "just work".

Bug: http://b/271183179
Test: treehugger
Change-Id: Ib6750d1266fd6030958662ecec591f6d708915a6
2 files changed