make: Fix shell exit status handling

Right now whenever we have shell commands with loops, errors in the
middle are accidentally ignored, and make continues to process commands.

This adds 'set -e' to all of those, so they'll propagate back up.

Signed-off-by: Peter Jones <pjones@redhat.com>

Makefile

@@ -83,14 +83,14 @@ $(SUBDIRS):
 
 clean:
 	rm -f *~
-	@for d in $(SUBDIRS); do \
+	@set -e ; for d in $(SUBDIRS); do \
 		if [ -d $(OBJDIR)/$$d ]; then \
 			$(MAKE) -C $(OBJDIR)/$$d -f $(SRCDIR)/$$d/Makefile SRCDIR=$(SRCDIR)/$$d clean; \
 		fi; \
 	done
 
 install:
-	@for d in $(SUBDIRS); do \
+	@set -e ; for d in $(SUBDIRS); do \
 		mkdir -p $(OBJDIR)/$$d; \
 		$(MAKE) -C $(OBJDIR)/$$d -f $(SRCDIR)/$$d/Makefile SRCDIR=$(SRCDIR)/$$d install; done
 

lib/Makefile

@@ -72,7 +72,7 @@ all: libsubdirs libefi.a
 
 .PHONY: libsubdirs
 libsubdirs:
-	for sdir in $(SUBDIRS); do mkdir -p $$sdir; done
+	@set -e ; for sdir in $(SUBDIRS); do mkdir -p $$sdir; done
 
 $(OBJS): libsubdirs