[google/syzkaller] c8823b: pkg/report: fix parsing of syscall entry points

[Dmitry Vyukov]

Branch: refs/heads/master
Home: https://github.com/google/syzkaller
Commit: c8823b7eb4f2349bc37d14741fbfe734648fce02
https://github.com/google/syzkaller/commit/c8823b7eb4f2349bc37d14741fbfe734648fce02
Author: Dmitry Vyukov <dvy...@google.com>
Date: 2021-10-25 (Mon, 25 Oct 2021)

Changed paths:
M pkg/report/linux.go
A pkg/report/testdata/linux/report/622
A pkg/report/testdata/linux/report/623

Log Message:
-----------
pkg/report: fix parsing of syscall entry points

gcc and clang somehow print different frames around syscall entry.
sys_-prefixed names is what currently produced for gcc (more common)
and we have lots of existing reports with sys_ prefix.
So make the clang frames parsed the same way as gcc frames are currently parsed.