initial armh support

Somewhat kludgy unfortunately and might need even more tweaking,
I have only armv7l board handy at the moment to verify that
the transformation is going to work.

QEMU is bailing out here and now ("Exec format error").

Example sources.list.sisyphus.armh of the season:

  rpm http://ftp.altlinux.ru/pub/people/asdus/sisyphus armh classic
  rpm http://ftp.altlinux.ru/pub/people/asdus/sisyphus noarch classic

Makefile

@@ -10,7 +10,8 @@ ifndef ARCHES
 ifdef ARCH
 ARCHES := $(ARCH)
 else
-ARCHES := $(shell arch | sed 's/i686/i586/; s/armv.*/arm/; s/ppc.*/ppc/')
+ARCHES := $(shell arch \
+	| sed 's/i686/i586/; s/armv7.*/armh/; s/armv.*/arm/; s/ppc.*/ppc/')
 endif
 endif
 export ARCHES

lib/build.mk

@@ -21,10 +21,12 @@ LOWSPACE = 1024
 START += time -f "%E %PCPU %Mk"
 
 # /usr/bin/{i586,x86_64} are setarch(8) symlinks but arm is not;
+# armh (armv7l) doesn't have any but should cope with qemu-arm.static;
 # also check whether non-x86 build is running native
+EARCH := $(subst armh,arm,$(ARCH))
 ifeq (,$(wildcard $(subst :,/$(ARCH) ,$(PATH):)))
-ifeq (,$(findstring $(ARCH),$(shell uname -m)))
-export GLOBAL_HSH_USE_QEMU=$(ARCH)
+ifeq (,$(findstring $(EARCH),$(shell uname -m)))
+export GLOBAL_HSH_USE_QEMU=$(EARCH)
 endif
 else
 START += $(ARCH)