ci: Hard reset subprojects

Another attempt to make meson handle the
master -> main transition in glib.

.gitlab-ci.yml

@@ -78,7 +78,8 @@ fedora-x86_64:
     EXTRA_MESON_FLAGS: "--buildtype=debug --default-library=both"
   script:
     - .gitlab-ci/show-info-linux.sh
-    - meson subprojects update
+    - rm -rf subprojects/glib
+    - meson subprojects update --reset
     - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
             _build
     - ninja -C _build
@@ -94,7 +95,7 @@ release-build:
     EXTRA_MESON_FLAGS: "--buildtype=release"
   script:
     - .gitlab-ci/show-info-linux.sh
-    - meson subprojects update
+    - meson subprojects update --reset
     - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
             _build
     - ninja -C _build
@@ -109,7 +110,7 @@ installed-tests:
     G_TEST_ACCESSIBLE: 1
   script:
     - .gitlab-ci/show-info-linux.sh
-    - meson subprojects update
+    - meson subprojects update --reset
     - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
             _build
     - ninja -C _build
@@ -164,6 +165,7 @@ macos:
     - export PATH=/Users/gitlabrunner/Library/Python/3.7/bin:$PATH
     - export MESON_FORCE_BACKTRACE=1
   script:
+    - meson subprojects update --reset
     - meson -Dx11-backend=false
             -Dintrospection=disabled
             -Dcpp_std=c++11