Honour errors when processing more than one file

When using dwz -L0 on a hello world a.out, it fails:
...
$ dwz -L0 a.out
$ echo $?
1
...

But when we do the same for a.out and a copy b.out, it passes:
...
$ cp a.out b.out
$ dwz -L0 a.out b.out
$ echo $?
0
...

Fix this by honouring dwz return codes when processing more than one file.

2019-05-10  Tom de Vries  <tdevries@suse.de>

	PR dwz/24301
	* dwz.c (main): Handle dwz returning 1 if processing more than one file.
	* testsuite/dwz.tests/pr24171.sh: Update expected return status.
	* testsuite/dwz.tests/two-files-too-many-dies.sh: Same.

---
 dwz.c                                          | 2 ++
 testsuite/dwz.tests/pr24171.sh                 | 2 +-
 testsuite/dwz.tests/two-files-too-many-dies.sh | 6 +-----
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/dwz.c b/dwz.c
index 51300d3..6f34a0c 100644
--- a/dwz.c
+++ b/dwz.c
@@ -12291,6 +12291,8 @@ main (int argc, char *argv[])
 	    }
 	  else if (resa[i - optind].res == 0)
 	    successcount++;
+	  else if (thisret == 1)
+	    ret = 1;
 	  if (hardlink
 	      && resa[i - optind].res >= 0
 	      && resa[i - optind].nlink > 1)
diff --git a/testsuite/dwz.tests/pr24171.sh b/testsuite/dwz.tests/pr24171.sh
index 0705489..31b2439 100644
--- a/testsuite/dwz.tests/pr24171.sh
+++ b/testsuite/dwz.tests/pr24171.sh
@@ -10,6 +10,6 @@ if ! grep -q "DW_AT_stmt_list not DW_FORM_sec_offset or DW_FORM_data4" dwz.err;
     exit 1
 fi
 
-[ $status -eq 0 ]
+[ $status -eq 1 ]
 
 rm -f 1 2 dwz.err
diff --git a/testsuite/dwz.tests/two-files-too-many-dies.sh b/testsuite/dwz.tests/two-files-too-many-dies.sh
index fb7d496..13950ba 100644
--- a/testsuite/dwz.tests/two-files-too-many-dies.sh
+++ b/testsuite/dwz.tests/two-files-too-many-dies.sh
@@ -9,11 +9,7 @@ if ! grep -q "Too many DIEs, not optimizing" dwz.err; then
     exit 1
 fi
 
-if [ $status -eq 0 ]; then
-    echo "PR24301 workaround used" > dwz.info
-else
-    [ $status -eq 1 ]
-fi
+[ $status -eq 1 ]
 
 cmp 1 $execs/hello
 cmp 2 $execs/hello