Fixing issue #108: rpmbuild runs cmake underneath, but this second instance...

Fixing issue #108: rpmbuild runs cmake underneath, but this second instance needs to propagate the variables passed to the initial cmake.

cta.spec.in

@@ -69,7 +69,7 @@ The CTA project is the CERN Tape Archive system.
 mkdir -p build
 cd build
 # The cmake step does the selection between client/server compilation or just client
-cmake .. -DCOMPILE_PACKAGING:STRING=0
+CTA_VERSION=%{ctaVersion} cmake .. -DCOMPILE_PACKAGING:STRING=0 -DVCS_VERSION=%{ctaRelease}
 # Workaround for the inability of cmake to handle properly the dependencies to generated code.
 %{__make} -s %{_smp_mflags} -k || true
 %{__make} -s %{_smp_mflags}