Python checks to see how many cpus it is allowed to use and bypasses …

…what poudriere allows for the build. This causes emulation failures and failed builds/deadlocks.

src/share/poudriere/jail.sh

@@ -356,6 +356,7 @@ build_and_install_world() {
 		STRINGS=/nxb-bin/usr/bin/strings
 		AWK=/nxb-bin/usr/bin/awk
 		FLEX=/nxb-bin/usr/bin/flex
+		_MAKE_JOBS=-j1
 		EOF
 
 		# hardlink these files to capture scripts and tools