samples/chre: Filter out targets not providing a full libc

When the only C library available is the minimal one, this test cannot
work. Accept only platforms with full C library support to prevent build
failures.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

samples/modules/chre/sample.yaml

@@ -24,4 +24,4 @@ tests:
         - "I: Exiting EventLoop.*"
     integration_platforms:
       - native_posix
-    filter: not CONFIG_MINIMAL_LIBC
+    filter: CONFIG_FULL_LIBC_SUPPORTED