cpukit/bsd-tree.h: prepend CPP with RTEMS_ scoping

spec/build/testsuites/sptests/grp.yml

@@ -450,6 +450,8 @@ links:
   uid: sptls03
 - role: build-dependency
   uid: sptls04
+- role: build-dependency
+  uid: sptree01
 - role: build-dependency
   uid: spunlimited01
 - role: build-dependency

spec/build/testsuites/sptests/sptree01.yml

@@ -0,0 +1,19 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: test-program
+cflags: []
+copyrights:
+- Copyright (C) 2024 Gedare Bloom 
+cppflags: []
+cxxflags: []
+enabled-by: true
+features: c cprogram
+includes: []
+ldflags: []
+links: []
+source:
+- testsuites/sptests/sptree01/init.c
+stlib: []
+target: testsuites/sptests/sptree01.exe
+type: build
+use-after: []
+use-before: []