sparc64 tests are passing again

Closes #1064 .

Author: gnzlbg

.travis.yml

@@ -113,8 +113,6 @@ matrix:
     - env: TARGET=x86_64-apple-ios
            CARGO_TARGET_X86_64_APPLE_IOS_RUNNER=$HOME/runtest
            RUSTFLAGS=-Clink-arg=-mios-simulator-version-min=7.0
-    # FIXME(#1064)
-    - env: TARGET=sparc64-unknown-linux-gnu
 
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