support/testing: use core2duo cpu emulation for TestGlxinfo

TestGlxinfo fail with a new runtime error:

  # glxinfo -B -display :0
  name of display: :0
  traps: glxinfo[84] trap invalid opcode ip:b73c7027 sp:bf8433c0 error:0 in swrast_dri.so[b6e4c000+64f000]
  Illegal instruction

The x86-core2 Bootlin toolchains are built for a core2 CPU [0],
this means that the Bootlin toolchains may use core2-specific
instructions.

The TestGlxinfo test is setup for BR2_x86_core2, so our
executables will also contain core2 instructions.

However, the default Qemu x86 is not guaranteed to emulate all the
instructions specific to core2, causing runtime issues as reported
above.

A similar issue has been fixed by adding Nehalem cpu emulation on
the qemu command line. See 4f565b5222 ("support/testing: use Nehalem
cpu emulation for TestGrubX8664EFI").

Set core2duo cpu emulation for TestGlxinfo on the qemu command line.

[0] https://gitlab.com/buildroot.org/toolchains-builder/-/blob/kubu/toolchain-builder-2023.08/configs/arch/x86-core2.config?ref_type=heads

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/test_glxinfo.py

@@ -42,7 +42,8 @@ class TestGlxinfo(infra.basetest.BRTest):
         self.emulator.boot(arch="i386",
                            kernel=kern,
                            kernel_cmdline=["root=/dev/vda console=ttyS0"],
-                           options=["-M", "pc", "-m", "512", "-drive", "file={},if=virtio,format=raw".format(img)])
+                           options=["-M", "pc", "-cpu", "core2duo", "-m", "512",
+                                    "-drive", "file={},if=virtio,format=raw".format(img)])
         self.emulator.login()
 
     def test_run(self):