According to the pkg-config manual, "Libs" should not contain flags
for _required_ packages. Instead, they should be expressed via
"Requires". Let's do that
This reverts commit 2253224b33.
Reason for revert: Causes massive build failure for osmo-pcu and osmo-sgsn on all the distributions/architectures we build for
Change-Id: I6dbe4507701bee013b29dcc26f32c4e1a3c23613
Closes: OS#4936
The dependency on mnl breaks builds of osmo-pcu et al if mnl is used for
libosmogb, but not linked in for lib users
Change-Id: Ib4df95d5c922f8edfa33e68645652fd30d321ff8
Shipping our own private copy of talloc was a good idea in 2008,
when it was not readily available on most target platforms. Today,
the situation is quite different, as it is a standard library on
major Linux distributions.