COMPMID-3069: Improve build time by splitting up ToolchainSupport.h

Split out the parts of ToolchainSupport coming from <memory> and
the parts coming from <string> into their own new header files.
This accounts for 99% of uses of ToolchainSupport, which means that
expensive header files such as arm_neon.h don't need to be included
everywhere.

Knocks about 10% of compilation time off kernel files.

Signed-off-by: Matthew Bentham <matthew.bentham@arm.com>
Change-Id: I2ae718fe766b5ff28608812b0f686f30eeac1b21
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2852
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/runtime/NEON/functions/NEHOGDetector.cpp b/src/runtime/NEON/functions/NEHOGDetector.cpp
index 49d0778..95d7aae 100644
--- a/src/runtime/NEON/functions/NEHOGDetector.cpp
+++ b/src/runtime/NEON/functions/NEHOGDetector.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -24,7 +24,7 @@
 #include "arm_compute/runtime/NEON/functions/NEHOGDetector.h"
 
 #include "arm_compute/core/NEON/kernels/NEHOGDetectorKernel.h"
-#include "support/ToolchainSupport.h"
+#include "support/MemorySupport.h"
 
 using namespace arm_compute;
 
@@ -33,4 +33,4 @@
     auto k = arm_compute::support::cpp14::make_unique<NEHOGDetectorKernel>();
     k->configure(input, hog, detection_windows, detection_window_stride, threshold, idx_class);
     _kernel = std::move(k);
-}
\ No newline at end of file
+}