configure: Deal with OpenBSD/i386 emulation linker

OpenBSD/i386 uses elf_i386_obsd for the emulation linker.

Signed-off-by: Brad Smith <brad@comstyle.com>
Message-id: 20171107234608.GA395@humpty.home.comstyle.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/configure b/configure
index 0e856bb..0c6e757 100755
--- a/configure
+++ b/configure
@@ -5302,9 +5302,9 @@
         "$targetos" != "Darwin" -a "$targetos" != "SunOS" -a \
         "$softmmu" = yes ; then
     # Different host OS linkers have different ideas about the name of the ELF
-    # emulation. Linux and OpenBSD use 'elf_i386'; FreeBSD uses the _fbsd
-    # variant; and Windows uses i386pe.
-    for emu in elf_i386 elf_i386_fbsd i386pe; do
+    # emulation. Linux and OpenBSD/amd64 use 'elf_i386'; FreeBSD uses the _fbsd
+    # variant; OpenBSD/i386 uses the _obsd variant; and Windows uses i386pe.
+    for emu in elf_i386 elf_i386_fbsd elf_i386_obsd i386pe; do
         if "$ld" -verbose 2>&1 | grep -q "^[[:space:]]*$emu[[:space:]]*$"; then
             ld_i386_emulation="$emu"
             roms="optionrom"