Bug 1320991 - Support --with-system-{nss,nspr} in modules/libmar; r=glandium

The problem with the modules/libmar/tests/moz.build file when building
--with-system-nspr and --with-system-nss is that the nss libraries don't
exist in the tree, so they fail when trying to copy into the test
directory.

However, it turns out that the libraries copied into the test directory
aren't even used when building with an in-tree copy, because the
xpcshell launcher sets LD_LIBRARY_PATH to point to dist/bin. Since we
use the dist/bin copies anyway for an in-tree build, we can stop copying
them into the test directory and simultaneously fix the --with-system
build.

The DEFINES can also go away since this directory doesn't actually build
anything.

MozReview-Commit-ID: Bk2f28wc9ZJ

--HG--
extra : rebase_source : 63683bbc0c9624121067268cfe6dce0f93b7fbd2

modules/libmar/tests/moz.build

@@ -6,24 +6,7 @@
 
 XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
 
-DEFINES['BIN_SUFFIX'] = CONFIG['BIN_SUFFIX']
-
 if CONFIG['OS_TARGET'] != 'Android':
-    nss_files = ['nss3']
-    if not CONFIG['MOZ_FOLD_LIBS']:
-        nss_files.extend([
-            'nssutil3',
-            'plc4',
-            'nspr4',
-            'plds4',
-        ])
-    TEST_HARNESS_FILES.xpcshell.modules.libmar.tests.unit += sorted(
-        ['!/dist/bin/%s%s%s' % (
-            CONFIG['DLL_PREFIX'],
-            name,
-            CONFIG['DLL_SUFFIX'],
-        ) for name in nss_files]
-    )
     TEST_HARNESS_FILES.xpcshell.modules.libmar.tests.unit += [
         '!../tool/signmar%s' % CONFIG['BIN_SUFFIX'],
     ]