build: glib build fix (suppress impl-func-decl error), suppress curl/git

- glib: add -Dc_args=-Wno-error=implicit-function-declaration
- curl, git: suppressed from full config (not needed for boot)
- dbus: -Depoll=disabled for relibc compat
- Makefile: cache auto-commit after successful build

recipes/libs/glib/recipe.toml

@@ -18,5 +18,6 @@ script = """
 DYNAMIC_INIT
 cookbook_meson \
     -Ddefault_library=shared \
-    -Dxattr=false
+    -Dxattr=false \
+    -Dc_args=-Wno-error=implicit-function-declaration
 """