support/testing: Test{No, All, NonDefaultLimited}Timezone: use base configuration

While at it remove Glibc from the test name since all Timezone
now use a Glibc toolchain.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/core/test_timezone.py

@@ -26,11 +26,9 @@ class TestNoTimezone(infra.basetest.BRTest):
         self.assertEqual(tz[0].strip(), "UTC")
 
 
-class TestGlibcAllTimezone(infra.basetest.BRTest):
-    config = \
+class TestAllTimezone(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
         """
-        BR2_arm=y
-        BR2_TOOLCHAIN_EXTERNAL=y
         BR2_TARGET_TZ_INFO=y
         BR2_TARGET_ROOTFS_CPIO=y
         # BR2_TARGET_ROOTFS_TAR is not set
@@ -48,11 +46,9 @@ class TestGlibcAllTimezone(infra.basetest.BRTest):
         self.assertEqual(tz[0].strip(), "CET")
 
 
-class TestGlibcNonDefaultLimitedTimezone(infra.basetest.BRTest):
-    config = \
+class TestNonDefaultLimitedTimezone(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
         """
-        BR2_arm=y
-        BR2_TOOLCHAIN_EXTERNAL=y
         BR2_TARGET_TZ_INFO=y
         BR2_TARGET_TZ_ZONELIST="northamerica"
         BR2_TARGET_LOCALTIME="America/New_York"