build: Fix mghttpd01 test exclude

Update #3818.

spec/build/bsps/powerpc/mpc55xxevb/tstmpc5643ldpu.yml

@@ -1,17 +0,0 @@
-SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
-actions:
-- set-test-state:
-    fileio: exclude
-    pppd: exclude
-    psxaio02: exclude
-build-type: option
-copyrights:
-- Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
-default: null
-default-by-variant: []
-description: ''
-enabled-by: true
-links:
-- role: build-dependency
-  uid: ../../tstsmallmem
-type: build

spec/build/bsps/powerpc/mpc55xxevb/tstmpc5643levb.yml

@@ -2,6 +2,7 @@ SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
 actions:
 - set-test-state:
     fileio: exclude
+    mghttpd01: exclude
     pppd: exclude
     psxaio02: exclude
 build-type: option

spec/build/testsuites/libtests/mghttpd01.yml

@@ -17,6 +17,7 @@ enabled-by:
 - and:
   - RTEMS_NETWORKING
   - RTEMS_POSIX_API
+  - not: TEST_MGHTTPD01_EXCLUDE
 includes:
 - cpukit/libnetworking
 - testsuites/libtests/mghttpd01