gtest: reduced build requirements

(strange behavior with bld.stlib)

playground/gtest/src/wscript_build

@@ -1,8 +1,7 @@
 #! /usr/bin/env python
 # encoding: utf-8
 
-bld(
-	features = 'cxx cxxstlib',
+bld.stlib(
 	source   = 'Accumulator.cpp HelloWorld.cpp',
 	target   = 'useless',
 	export_includes = '.',

playground/gtest/tests/test0/wscript_build

@@ -1,8 +1,8 @@
 #! /usr/bin/env python
 # encoding: utf-8
 
-bld(
-	features = 'cxx cxxprogram test',
+bld.program(
+	features = 'test',
 	source   = 'HelloWorldTest.cpp',
 	target   = 'unit_test_program',
 	use      = 'unittestmain useless GTEST',

playground/gtest/tests/test1/wscript_build

@@ -7,8 +7,8 @@ def fun(task):
 	# print task.generator.bld.name_to_obj('somelib').link_task.outputs[0].abspath(task.env)
 	# task.ut_exec.append('--help')
 
-bld(
-	features = 'cxx cxxprogram test',
+bld.program(
+	features = 'test',
 	source   = 'AccumulatorTest.cpp',
 	target   = 'unit_test_program',
 	use      = 'unittestmain useless GTEST',

playground/gtest/tests/wscript

@@ -4,8 +4,10 @@
 def build(bld):
 	bld.recurse('test0 test1')
 
+    # can't use bld.stlib
 	bld(
-		features = 'cxx stlib',
+        # cxxstlib not required?!
+		features = 'cxx',
 		source   = 'gtest_main.cc',
 		use      = 'GTEST',
 		target   = 'unittestmain')