tests: Fix {rtc, m48t59}-test build on illumos

Struct tm does not have tm_gmtoff field on illumos.
Fix the build by not zero-initializing these fields on Solaris.

Cc: qemu-stable@nongnu.org
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/tests/m48t59-test.c b/tests/m48t59-test.c
index d79f554..77d69b3 100644
--- a/tests/m48t59-test.c
+++ b/tests/m48t59-test.c
@@ -142,7 +142,9 @@
     date->tm_mday = mday;
     date->tm_mon = mon - 1;
     date->tm_year = base_year + year - 1900;
+#ifndef __sun__
     date->tm_gmtoff = 0;
+#endif
 
     ts = mktime(date);
 }
diff --git a/tests/rtc-test.c b/tests/rtc-test.c
index e7123ca..203c0fc 100644
--- a/tests/rtc-test.c
+++ b/tests/rtc-test.c
@@ -115,7 +115,9 @@
     date->tm_mday = mday;
     date->tm_mon = mon - 1;
     date->tm_year = base_year + year - 1900;
+#ifndef __sun__
     date->tm_gmtoff = 0;
+#endif
 
     ts = mktime(date);
 }