Increase GWT localWorkers to 2

Having 2 localWorkers for GWT build decreases compilation time
significantly and it doesn't exceed available resources in CBS.

Signed-off-by: Martin Perina <mperina@redhat.com>

ovirt-engine.spec.in

@@ -44,7 +44,7 @@
 %endif
 
 # Limit GWT resources to pass the build in CBS
-%global ovirt_build_extra_flags_rpm -Dgwt.compiler.localWorkers=1
+%global ovirt_build_extra_flags_rpm -Dgwt.compiler.localWorkers=2
 
 # Set "rhv_build 1" to perform RHV Manager build
 %global rhv_build 0