meson: bump submodule to 0.59.2

meson: bump submodule to 0.59.2

The update to 0.57 has been delayed due to it causing warnings for
some actual issues, but it brings in important bugfixes and new
features.  0.58 also brings in a bugfix that is useful for modinfo.

Important bugfixes:

- 0.57: https://github.com/mesonbuild/meson/pull/7760, build: use PIE
objects for non-PIC static libraries if b_pie=true

- 0.57: https://github.com/mesonbuild/meson/pull/7900, thus avoiding
unnecessary rebuilds after running meson.

- 0.58.2: https://github.com/mesonbuild/meson/pull/8900, fixes for
passing extract_objects() to custom_target (useful for modinfo)

Features:

- 0.57: the keyval module has now been stabilized

- 0.57: env argument to custom_target (useful for hexagon)

- 0.57: Feature parity between "meson test" and QEMU's TAP driver

- 0.57: https://github.com/mesonbuild/meson/pull/8231, allows bringing
back version numbers in the configuration summary

- 0.59: Utility methods for feature objects

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>