Unbreak and enable tests

Fixed upstream after report.

NO_TEST hint by ajacoutot@ Thanks!

devel/dlib/Makefile

@@ -1,8 +1,9 @@
-# $OpenBSD: Makefile,v 1.9 2019/04/19 08:26:49 rsadowski Exp $
+# $OpenBSD: Makefile,v 1.10 2019/04/21 09:43:47 rsadowski Exp $
 
 COMMENT =		C++ toolkit for machine learning and data analysis
 
 DISTNAME =		dlib-19.17
+REVISION =		0
 
 SHARED_LIBS +=  dlib                      3.4 # 19.7
 
@@ -39,9 +40,6 @@ CONFIGURE_ARGS =	-DDLIB_USE_BLAS=OFF \
 
 TEST_DEPENDS =		${FULLPKGNAME}:${BUILD_PKGPATH}
 
-# XXX Build error, reported upstream
-NO_TEST =		Yes
-
 pre-test:
 	test -d ${WRKBUILD}/dlib/test || mkdir ${WRKBUILD}/dlib/test \
 	&& cd ${WRKBUILD}/dlib/test && \

devel/dlib/patches/patch-dlib_test_stack_cpp

@@ -0,0 +1,28 @@
+$OpenBSD: patch-dlib_test_stack_cpp,v 1.1 2019/04/21 09:43:47 rsadowski Exp $
+
+https://github.com/davisking/dlib/commit/879202b796ddd8d0118ec3275ff18d7b25e14145
+
+Index: dlib/test/stack.cpp
+--- dlib/test/stack.cpp.orig
++++ dlib/test/stack.cpp
+@@ -15,7 +15,6 @@ namespace  
+ 
+     using namespace test;
+     using namespace dlib;
+-    using namespace std;
+ 
+     logger dlog("test.stack");
+ 
+@@ -220,10 +219,10 @@ namespace  
+ 
+             // serialize the state of a2, then clear a2, then
+             // load the state back into a2.
+-            ostringstream sout;
++            std::ostringstream sout;
+             serialize(a2,sout);
+             DLIB_TEST(a2.at_start() == true);
+-            istringstream sin(sout.str());
++            std::istringstream sin(sout.str());
+             a2.clear();
+             deserialize(a2,sin);
+