Always run configure with option --host

[Do Thanh Trung <trung.dothanh@toshiba-tsdv.com>]

Hi everyone,

I am trying to fix cross-build problem with build arch compiler by 
adding option "--host" to debian/rules. However I found there are 2 
styles for doing this in Debian packages and I don't know which way is 
better:

- Style 1: Always call "--host":
./configure --build $(DEB_BUILD_GNU_TYPE) --host $(DEB_HOST_GNU_TYPE)

- Style 2: Only call "--host" if cross-build. For example, from package 
"acl":
ifeq ($(DEB_BUILD_GNU_TYPE), $(DEB_HOST_GNU_TYPE))
  LOCAL_CONFIGURE_OPTIONS += --build $(DEB_HOST_GNU_TYPE)
else
  LOCAL_CONFIGURE_OPTIONS += --build $(DEB_BUILD_GNU_TYPE) --host 
$(DEB_HOST_GNU_TYPE)
endif

I think the first way makes code shorter and easier. I wonder if there 
are any strong reasons to follow the second way than the first way. 
Which way you prefer when fix this kind of problem.

Thanks,
Trung

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