packaging: add a hack for efa-config/libfabric

efa-config is necessary to populate ldconfig cache for libfabric, rather
than libfabric specifying this itself. This means its insufficient for
aws-ofi-nccl to simply depend on libfabric, because pulling in libfabric
as a build dependency doesn't pull in efa-config, which is necessary to
actually resolve the library. Add a gross hack that runs the entire
build with LD_LIBRARY_PATH set. It's an understatement to say that this
is not ideal.

Signed-off-by: Nicholas Sielicki <[email protected]>

contrib/debian-template/rules

@@ -23,5 +23,9 @@ override_dh_auto_configure:
 		--disable-tests \
 		--disable-werror
 
+#%:
+#	dh $@
+# this is a hack to work around efa-installer diamond dependency with
+# efa-config/libfabric-aws and should be removed.
 %:
-	dh $@
+	LD_LIBRARY_PATH=/opt/amazon/efa/lib:${LD_LIBRARY_PATH} dh $@