bionic: Fix aliasing violations

This makes bionic compile with compilers enforcing
strict adherence to aliasing rules (e.g. gcc 4.6+
with -Wstrict-aliasing=2 -Werror=strict-aliasing).

Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>

Conflicts:

	libc/netbsd/net/getaddrinfo.c
	libc/netbsd/net/getnameinfo.c

Change-Id: I4a6fd36a66b23d963ce137916caece4a424e78ab
Gross fix for IN6_IS_ADDR_TEREDO aliasing... explodes generating ASM with the fix from jb42

Change-Id: I99c7e867e600bbb47309bc89b0c6cacb0883a84d