python-pygobject: disable parallel install

python-pygobject: disable parallel install

The installation of __glib.so is invoked by install-data-am target
which are generated by automake. installing libpyglib-2.0-python is
invoked by install-exec-am.

"make install" will firstly install libpyglib-2.0-python, then install
__glib.so, the sequence should not be broken, since _glib.so has
dependence on libpyglib-2.0-python. But when enable parallel install,
the sequence maybe break then installation fails with:
 "/usr/bin/ld: cannot find -lpyglib-2.0-python"

Disable parallel install to fix this issue.

(From OE-Core rev: e87a0c81c77d11f892a34c2d14ffbeb4342d32dd)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>