include/target.mk: disambiguate package architecture

Add $ARCH and $CPU_SUBTYPE to the package architecture strings to differentiate
low and big endian targets as well as extended instructions sets like NEON
or DSP2.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

include/target.mk

@@ -281,7 +281,7 @@ define BuildTargets/DumpCurrent
 	 echo 'Target-Name: $(BOARDNAME)$(if $(SUBTARGETS),$(if $(SUBTARGET),))'; \
 	 echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'; \
 	 echo 'Target-Arch: $(ARCH)'; \
-	 echo 'Target-Arch-Packages: $(if $(ARCH_PACKAGES),$(ARCH_PACKAGES),$(if $(CPU_TYPE),$(CPU_TYPE),$(ARCH)))'; \
+	 echo 'Target-Arch-Packages: $(if $(ARCH_PACKAGES),$(ARCH_PACKAGES),$(ARCH)$(if $(CPU_TYPE),_$(CPU_TYPE))$(if $(CPU_SUBTYPE),_$(CPU_SUBTYPE)))'; \
 	 echo 'Target-Features: $(FEATURES)'; \
 	 echo 'Target-Depends: $(DEPENDS)'; \
 	 echo 'Target-Optimization: $(if $(CFLAGS),$(CFLAGS),$(DEFAULT_CFLAGS))'; \