Do not pass "-pie" in cflags

Bug: http://b/111000555

It's only needed for linking and Android already passes this by default.
Passing it to a compile step causes clang to emit
-Wunused-command-line-argument.

Test: build
Change-Id: Iea608387a57f0a65cfc3e67ab19c8d812f4aef37
1 file changed