[PATCH] Avoid leaking TEST_LOG_COMPILER in environment of test scripts

[Stefano Lattarini]

The automake test driver presently don't prevent the variable
TEST_LOG_COMPILER from leaking into the test scripts. This can cause
some weird errors when a developer decide to override the 
TEST_LOG_COMPILER from the command line when running the automake
testsuite (as in e.g. `make check TEST_LOG_COMPILER=/bin/ksh', which
can be used to check that the test scripts are portable to ksh).

The just-one-line attached patch fixes this.

Regards,
     Stefano

Avoid-leaking-TEST_LOG_COMPILER-in-environment-of-test-scripts.patch
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