[binutils-gdb] S390: Skip prologue using SAL information, if possible

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT f054145ed2bad0aa0f57b2a4c3ca6988b213d1a3 ***

Author: Andreas Arnez <arnez@linux.vnet.ibm.com>
Branch: master
Commit: f054145ed2bad0aa0f57b2a4c3ca6988b213d1a3

S390: Skip prologue using SAL information, if possible
Instead of analyzing the prologue and possibly coming to a wrong
conclusion, this change tries to skip the prologue with the use of
skip_prologue_using_sal.  Only if that fails, the prologue analyzer is
invoked as before.

gdb/ChangeLog:

	* s390-linux-tdep.c (s390_skip_prologue): Skip the prologue using
	SAL, if possible.