Clean up strace sigaction output

Search include/{arch} before include to find arch specific include files
The MIPS struct sigaction is common between bionic and the kernel
Fix formatting of struct sigaction output

Signed-off-by: Chris Dearman <chris.dearman@imgtec.com>

(cherry picked from commit e9a430f1f008b29a34634615361801ac93b3c7a3)

Change-Id: Ic7ee47883933365d96c20e0478d1b0714a8bd8ea