gitlab: disable optimization and debug symbols in msys build

Building at -O2, adds 33% to the build time, over -O2. IOW a build that
takes 45 minutes at -O0, takes 60 minutes at -O2. Turning off debug
symbols drops it further, down to 38 minutes.

IOW, a "-O2 -g" build is 58% slower than a "-O0" build on msys in the
gitlab CI windows shared runners.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230801130403.164060-8-berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

.gitlab-ci.d/windows.yml

@@ -113,7 +113,7 @@ msys2-64bit:
     # commit 9f8e6cad65a6 ("gitlab-ci: Speed up the msys2-64bit job by using --without-default-devices"
     # changed to compile QEMU with the --without-default-devices switch
     # for the msys2 64-bit job, due to the build could not complete within
-    CONFIGURE_ARGS:  --target-list=x86_64-softmmu --without-default-devices
+    CONFIGURE_ARGS:  --target-list=x86_64-softmmu --without-default-devices -Ddebug=false -Doptimization=0
     # qTests don't run successfully with "--without-default-devices",
     # so let's exclude the qtests from CI for now.
     TEST_ARGS: --no-suite qtest
@@ -123,5 +123,5 @@ msys2-32bit:
   variables:
     MINGW_TARGET: mingw-w64-i686
     MSYSTEM: MINGW32
-    CONFIGURE_ARGS:  --target-list=ppc64-softmmu
+    CONFIGURE_ARGS:  --target-list=ppc64-softmmu -Ddebug=false -Doptimization=0
     TEST_ARGS: --no-suite qtest