e2fsprogs: Use -fno-strict-aliasing

Build with -fno-strict-aliasing (because of code in
e2fsck/recovery.c: 537, 732) so we don't have to use
the flag globally

Change-Id: I55016b5322f431c0181b38147e4e72a2865782f5
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>