[interpreter] Update Makefile to ignore output of cd
#1683
Merged
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The interpreter Makefile captures the output of cding into the unittest
directory and listing the unittest files it contains. Under some circumstances,
the
cd
command will print the new current directory, and that output wasincorrectly being interpreted as the path to a unittest, causing the build to
fail.
Fix this problem by redirecting the output of cd, if any, to /dev/null.
Fixes #1681.