travis/linux-build: enable testing with clang builds
The CLANG version of the builds have not honored the TESTSUITE variable.
This dates to at least 2015, and the reason for the restriction isn't
clear.
@@ -119,7 +119,7 @@ else
make -j2 CFLAGS="$CFLAGS $BUILD_ENV $SPARSE_FLAGS" C=1
fi
-if [ "$TESTSUITE" ] && [ "$CC" != "clang" ]; then
+if [ "$TESTSUITE" ]; then
if ! make distcheck TESTSUITEFLAGS=-j4 RECHECK=yes; then
# testsuite.log is necessary for debugging.
cat */_build/tests/testsuite.log
