test/{10,12,13,14,17,30,31}: increase the disk sizes

test/{10,12,13,14,17,30,31}: increase the disk sizes

On Fedora 30 the paritition sizes turn out to be too small again:

  + mkdir -p /sysroot
  + mount /dev/dracut/root /sysroot
  + cp -a -t /sysroot /source/bin /source/dev /source/etc /source/lib /source/lib64 /source/proc /source/root /source/sbin /source/sys /source/tmp /source/usr /source/var
  cp: error writing '/sysroot/usr/lib64/libkrb5.so.3.3': No space left on device
  cp: error writing '/sysroot/usr/lib64/libkrb5support.so.0.1': No space left on device

It turns out that there has been quite some size increase in some libraries,
notably glibc, though not all -- some even shrunk, ruling out a toolchain
problem. Here's are files over 1M we install on Fedora 30:

   f29    f30
  2.7M => 6.4M /usr/lib64/{libc-2.28.so => libc-2.29.so}
  3.1M => 6.0M /usr/lib64/libcrypto.so.1.1.1c
  2.0M => 3.5M /usr/lib64/{libm-2.28.so => libm-2.29.so}
  2.9M => 2.8M /usr/lib/systemd/{libsystemd-shared-239.so => libsystemd-shared-241.so}
  1.7M => 2.5M /usr/lib64/libunistring.so.2.1.0
  2.3M => 2.4M /usr/lib64/bind9-export/libdns-export.so.1105.0.0
  1.2M => 2.1M /usr/bin/bash
  1.1M => 1.4M /usr/lib64/libkrb5.so.3.3
  1.2M => 1.4M /usr/lib64/libgcrypt.so.20.2.4
  612K => 1.1M /usr/lib64/libssl.so.1.1.1c

This increases the image sizes to accomodate for this. There's probably
little else we can do.