chromium: Disable use_system_libdrm option

A new assertion has been introduced, causing the build to fail with this
option enabled:

| ERROR at //build/config/linux/libdrm/BUILD.gn:18:3: Assertion failed.
|   assert(!is_linux, "System libdrm is not supported in linux")
|   ^-----
| System libdrm is not supported in linux
| See //ui/gfx/BUILD.gn:666:15: which caused the file to be included.
|     deps += [ "//build/config/linux/libdrm" ]

Link: https://chromium-review.googlesource.com/c/chromium/src/+/5956068
Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>

Author: adalessandro

meta-chromium/recipes-browser/chromium/chromium-ozone-wayland_132.0.6834.83.bb

@@ -20,7 +20,6 @@ GN_ARGS += "\
         use_system_wayland_scanner=true \
         use_xkbcommon=true \
         use_system_minigbm=true \
-        use_system_libdrm=true \
         use_system_libffi=true \
         use_gtk=false \
 "