check-suspend-resume-with-audio.sh: de-dupe directory.

There were two references to $(dirname "${BASH_SOURCE[0]}),
so a temp variable was created to hold this reference.  The
two references were then re-written.

Signed-off-by: Greg Galloway <greg.galloway@intel.com>

test-case/check-suspend-resume-with-audio.sh

@@ -22,8 +22,9 @@ set -e
 ## check kernel log and find no errors
 ##
 
+TESTDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/" && pwd)
 # shellcheck source=case-lib/lib.sh
-source "$(dirname "${BASH_SOURCE[0]}")"/../case-lib/lib.sh
+source "${TESTDIR}"/../case-lib/lib.sh
 
 OPT_NAME['l']='loop' OPT_DESC['l']='suspend/resume loop count'
 OPT_HAS_ARG['l']=1 OPT_VAL['l']=3
@@ -116,7 +117,7 @@ do
  ps --ppid $$ -f
  exit 1
  }
- "$(dirname "${BASH_SOURCE[0]}")"/check-suspend-resume.sh "${opt_arr[@]}" || die "suspend resume failed"
+ "${TESTDIR}"/check-suspend-resume.sh "${opt_arr[@]}" || die "suspend resume failed"
 
  # check kernel log for each iteration to catch issues
  sof-kernel-log-check.sh "$LOCAL_CHECK_POINT" || die "Caught error in kernel log"