Fix regression in r1916055 - don't duplicate logic in _run_linux.sh

from _before_linux.sh in whether the perl-framework is used/needed.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1916056 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit 0e7a32b)

test/travis_run_linux.sh

@@ -31,9 +31,9 @@ fi
 
 PREFIX=${PREFIX:-$HOME/build/httpd-root}
 
-# For trunk, "make check" is sufficient to run the test suite.
-# For 2.4.x, the test suite must be run manually
-if test ! -v SKIP_TESTING; then
+# If perl-framework testing is required it is checked out here by
+# _before_linux.sh:
+if test -d test/perl-framework; then
     CONFIG="$CONFIG --enable-load-all-modules"
     if grep -q ^check: Makefile.in; then
         CONFIG="--with-test-suite=test/perl-framework $CONFIG"