configs/raspberrypi3_qt5we: increase filesystem size

The build of raspberrypi3_qt5we_defconfig currently fails because the
filesystem image size is no longer large enough to contain everything:
the filesystem image size is 360 MB, but the total filesystem size
reported by "make graph-size" is 370 MB.

Let's increase the size to 400 MB for good measure.

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/389451889

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/raspberrypi3_qt5we_defconfig

@@ -43,7 +43,7 @@ BR2_PACKAGE_HOST_MTOOLS=y
 # Filesystem / image
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
-BR2_TARGET_ROOTFS_EXT2_SIZE="360M"
+BR2_TARGET_ROOTFS_EXT2_SIZE="400M"
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3/post-build.sh"