explicitely set SCRAM_ARCH for CMSSW 1_2_0

SiteTests/FroNtier/tests/CE-cms-frontier

@@ -11,10 +11,12 @@ echo "</pre>"
 # Choose CMSSW version
 #
 cmsswvsn=CMSSW_1_2_0
+# N.B. CMSSW_1_2_0 requires SCRAM_ARCH=slc3_ia32_gcc232
 #
 # Source the CMS environment
 echo "<h3>Sourcing the CMS environment</h3>"
 echo "<pre>"
+export SCRAM_ARCH=slc3_ia32_gcc232
 source $VO_CMS_SW_DIR/cmsset_default.sh
 result=$?
 echo "</pre>"