add tar file to archive format

Makefile

@@ -230,6 +230,7 @@ SHORT_PKG_VERSION = \
     $(word 1,$(subst ., ,$($(1)_VERSION))).$(word 2,$(subst ., ,$($(1)_VERSION)))
 
 UNPACK_ARCHIVE = \
+    $(if $(filter %.tar,     $(1)),tar xf  '$(1)', \
     $(if $(filter %.tgz,     $(1)),tar xzf '$(1)', \
     $(if $(filter %.tar.gz,  $(1)),tar xzf '$(1)', \
     $(if $(filter %.tar.Z,   $(1)),tar xzf '$(1)', \
@@ -242,7 +243,7 @@ UNPACK_ARCHIVE = \
     $(if $(filter %.7z,      $(1)),7za x '$(1)', \
     $(if $(filter %.zip,     $(1)),unzip -q '$(1)', \
     $(if $(filter %.deb,     $(1)),ar x '$(1)' && tar xf data.tar*, \
-    $(error Unknown archive format: $(1))))))))))))))
+    $(error Unknown archive format: $(1)))))))))))))))
 
 UNPACK_PKG_ARCHIVE = \
     $(call UNPACK_ARCHIVE,$(PKG_DIR)/$($(1)_FILE))