Rename test .c sources to .cpp where necessary (#604)

Remove hacks to force language from CMake files.

Closes KhronosGroup/OpenCL-CTS#25

test_conformance/api/test_bool.cpp

@@ -0,0 +1,51 @@
+//
+// Copyright (c) 2017 The Khronos Group Inc.
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "testBase.h"
+#include "harness/testHarness.h"
+
+
+const char *kernel_with_bool[] = {
+    "__kernel void kernel_with_bool(__global float *src, __global int *dst)\n"
+    "{\n"
+    "    int  tid = get_global_id(0);\n"
+    "\n"
+    "    bool myBool = (src[tid] < 0.5f) && (src[tid] > -0.5f);\n"
+    "    if(myBool)\n"
+    "    {\n"
+    "        dst[tid] = (int)src[tid];\n"
+    "    }\n"
+    "    else\n"
+    "    {\n"
+    "        dst[tid] = 0;\n"
+    "    }\n"
+    "\n"
+    "}\n"
+};
+
+int test_bool_type(cl_device_id deviceID, cl_context context, cl_command_queue queue, int num_elements)
+{
+
+    cl_program program;
+    cl_kernel kernel;
+
+    int err = create_single_kernel_helper(context,
+                      &program,
+                      &kernel,
+                      1, kernel_with_bool,
+                      "kernel_with_bool" );
+    return err;
+}
+