Only remove ldconf on uninstall

On update, the removal will occur AFTER the new package is installed,
due to some stupidity with how yum/rpm does things. Only remove it if
we're doing a pure uninstall

Change-Id: I4982610828d8bc1f2d8691b1e4ee1718c89413cc

runtime/hsa-runtime/RPM/rpm_postun

@@ -1 +1,3 @@
-rm -f /etc/ld.so.conf.d/hsa-rocr-dev.conf && ldconfig
+if [ $1 -eq 0]; then
+    rm -f /etc/ld.so.conf.d/hsa-rocr-dev.conf && ldconfig
+fi