glib: Add --disable-man to configure arguments

glib: Add --disable-man to configure arguments

Without this, glib will probe for the existence of xsltproc and use that
to decide whether or not it wants to generate manpages.  This has two
consequences, neither of them good:

a) the result of the build will vary depending on whether xsltproc
happens to be installed in either the native sysroot or the host
environment; and

b) if xsltproc does happen to be installed but docbook-xsl isn't, the
build will fail with "I/O error" messages.

(From OE-Core rev: b2e2c6e1a20ea4c53dea04992bb1b38890a959dd)

Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>