Fix Build Warnings for AArch64 (#2242)

This commit links to issue (#2234).

When cross-compiling for AArch64, using gcc 13.3, you encounter three
warnings types that turn into errors:

- maybe-uninitialized
- stringop-truncation
- strict-aliasing

This commit fixes all the warnings found, in regards to the first two
rules. To resolve the warnigns due to strict-aliasing, I am editing the
CMake build system.

Signed-off-by: Antonios Christidis <a-christidis@ti.com>

test_conformance/SVM/test_enqueue_api.cpp

@@ -160,8 +160,8 @@ REGISTER_TEST(svm_enqueue_api)
             error = clSetUserEventStatus(userEvent, CL_COMPLETE);
             test_error(error, "clSetUserEventStatus failed");
 
-            cl_uchar *src_ptr;
-            cl_uchar *dst_ptr;
+            cl_uchar *src_ptr = nullptr;
+            cl_uchar *dst_ptr = nullptr;
             if (test_case.srcAlloc == host)
             {
                 src_ptr = srcHostData.data();