contrib/jenkins.sh: Ensure PKG_CONFIG_PATH is set before build

... otherwise, there will be trouble finding the 'stow' libraries we
build.

Change-Id: I3ab09c8d35b7835ffbbd1e4bfdd0570a756b43df
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index 88b01a5..4571825 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -19,13 +19,13 @@
 
 verify_value_string_arrays_are_terminated.py $(find . -name "*.[hc]")
 
+export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
+export LD_LIBRARY_PATH="$inst/lib"
+
 osmo-build-dep.sh libosmocore "" --disable-doxygen
 osmo-build-dep.sh libosmo-abis
 osmo-build-dep.sh libosmo-netif
 
-export PKG_CONFIG_PATH="$inst/lib/pkgconfig:$PKG_CONFIG_PATH"
-export LD_LIBRARY_PATH="$inst/lib"
-
 set +x
 echo
 echo