Remove duplicate definition of align_{malloc,free} (#631)

Also use it instead of duplicating the code.

Fixes #326

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

test_common/harness/alloc.h

@@ -0,0 +1,68 @@
+//
+// Copyright (c) 2020 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.
+//
+
+#ifndef HARNESS_ALLOC_H_
+#define HARNESS_ALLOC_H_
+
+#if defined(__linux__) || defined (linux) || defined(__APPLE__)
+#if defined(__ANDROID__)
+#include <malloc.h>
+#else
+#include <stdlib.h>
+#endif
+#endif
+
+#if defined(__MINGW32__)
+#include "mingw_compat.h"
+#endif
+
+static void * align_malloc(size_t size, size_t alignment)
+{
+#if defined(_WIN32) && defined(_MSC_VER)
+    return _aligned_malloc(size, alignment);
+#elif  defined(__linux__) || defined (linux) || defined(__APPLE__)
+    void * ptr = NULL;
+#if defined(__ANDROID__)
+    ptr = memalign(alignment, size);
+    if ( ptr )
+        return ptr;
+#else
+    if (0 == posix_memalign(&ptr, alignment, size))
+        return ptr;
+#endif
+    return NULL;
+#elif defined(__MINGW32__)
+    return __mingw_aligned_malloc(size, alignment);
+#else
+    #error "Please add support OS for aligned malloc"
+#endif
+}
+
+static void align_free(void * ptr)
+{
+#if defined(_WIN32) && defined(_MSC_VER)
+    _aligned_free(ptr);
+#elif  defined(__linux__) || defined (linux) || defined(__APPLE__)
+    return  free(ptr);
+#elif defined(__MINGW32__)
+    return __mingw_aligned_free(ptr);
+#else
+    #error "Please add support OS for aligned free"
+#endif
+}
+
+#endif // #ifndef HARNESS_ALLOC_H_
+