[gjs] tests: fix a typo in bash script

[Philip Chimento <pchimento src gnome org>]

commit 350b794134e23dce5e5cabda25e01d5b41dfa04e
Author: Claudio André <claudioandre br gmail com>
Date:   Wed Mar 8 17:43:21 2017 -0300

    tests: fix a typo in bash script
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779772

 installed-tests/scripts/testCommandLine.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/installed-tests/scripts/testCommandLine.sh b/installed-tests/scripts/testCommandLine.sh
index e76ea29..c51a302 100755
--- a/installed-tests/scripts/testCommandLine.sh
+++ b/installed-tests/scripts/testCommandLine.sh
@@ -52,7 +52,7 @@ report_xfail () {
 # Test that System.exit() works in gjs-console
 "$gjs" -c 'imports.system.exit(0)'
 report "System.exit(0) should exit successfully"
-"gjs" -c 'imports.system.exit(42)'
+"$gjs" -c 'imports.system.exit(42)'
 test $? -eq 42
 report "System.exit(42) should exit with the correct exit code"