cryptohash-sha256: disable tests on mips and mipsel

p/haskell-cryptohash-sha256/debian/changelog

+haskell-cryptohash-sha256 (0.11.101.0-5) unstable; urgency=medium
+
+  * Disable tests on mips and mipsel due to strange pipe problem.
+
+ -- Clint Adams <clint@debian.org>  Sun, 29 Apr 2018 10:35:28 -0400
+
 haskell-cryptohash-sha256 (0.11.101.0-4) unstable; urgency=medium
 
   * Actually fix the build-deps.

p/haskell-cryptohash-sha256/debian/rules

 #!/usr/bin/make -f
 
-DEB_ENABLE_TESTS = yes
 DEB_SETUP_BIN_NAME = debian/hlibrary.setup
 DEB_CABAL_PACKAGE = cryptohash-sha256
 DEB_DEFAULT_COMPILER = ghc
 
+ifneq (,$(filter $(DEB_BUILD_ARCH),mips mipsel))
+    DEB_ENABLE_TESTS = no
+else
+    DEB_ENABLE_TESTS = yes
+endif
+
 include /usr/share/cdbs/1/rules/debhelper.mk
 include /usr/share/cdbs/1/class/hlibrary.mk