notparallel for examples

Former-commit-id: cf24699b2ace312fbb845757a1c2f3bbeb55b93c

examples/Makefile

@@ -1,7 +1,9 @@
 .PHONY: all
+.NOTPARALLEL: all
 
 DIRS=$(wildcard */)
 
+
 all: $(DIRS) 
 	for p in  $(DIRS); \
 	do \