Major infrastructure changes, part 2.

* Moved helpers, common and triggers dirs into xbps-src, where
  they belong.
* Renamed the templates dir to srcpkgs, it was so redundant before.
* Make it possible to add subpkgs with no restriction in names, for
  example udev now has a subpkgs called "libgudev". Previously
  subpkgs were named "${sourcepkg}-${pkgname}".
* xbps-src: changed to look for template files in current directory.
  That means that most arguments from the targets have been removed.
* xbps-src: added a reinstall target, to remove + install.
* xbps-src: do not overwrite binpkgs by default, skip them.

And more that I forgot because it's a mega-commit that I've been
working for some days already...

--HG--
extra : convert_revision : 0f466878584d1e6895d2a234f07ea1b2d1e61b3e

xbps-src/Makefile

@@ -1,7 +1,7 @@
 include vars.mk
 
 BIN	= xbps-src
-SUBDIRS	= etc shutils
+SUBDIRS	= etc common helpers triggers shutils
 
 .PHONY: all
 all:
@@ -10,14 +10,14 @@ all:
 	    -e  "s|@@XBPS_INSTALL_SHAREDIR@@|$(SHAREDIR)|g"	\
 		$(BIN).sh.in > $(BIN)
 	for dir in $(SUBDIRS); do		\
-		$(MAKE) -C $$dir;		\
+		$(MAKE) -C $$dir || exit 1;	\
 	done
 
 .PHONY: clean
 clean:
 	-rm -f $(BIN)
 	for dir in $(SUBDIRS); do		\
-		$(MAKE) -C $$dir clean;		\
+		$(MAKE) -C $$dir clean || exit 1;	\
 	done
 
 .PHONY: install
@@ -25,12 +25,12 @@ install: all
 	install -d $(SBINDIR)
 	install -m 755 $(BIN) $(SBINDIR)
 	for dir in $(SUBDIRS); do		\
-		$(MAKE) -C $$dir install;	\
+		$(MAKE) -C $$dir install || exit 1;	\
 	done
 
 .PHONY: uninstall
 uninstall:
 	-rm -f $(SBINDIR)/$(BIN)
 	for dir in $(SUBDIRS); do		\
-		$(MAKE) -C $$dir uninstall;	\
+		$(MAKE) -C $$dir uninstall || exit 1;	\
 	done