Update changelog

Expand MSVC to Visual Studio and announce the moving of the solution
files.

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
diff --git a/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt b/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt
index de37c27..435cc98 100644
--- a/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt
+++ b/ChangeLog.d/drop-msvc-2015-and-armcc-5.txt
@@ -1,2 +1,5 @@
 Requirement changes
-   * Drop support for MSVC 2013, 2015 and Arm Compiler 5.
+   * Drop support for Visual Studio 2013 and 2015, and Arm Compiler 5.
+Changes
+   * Rename directory containing Visual Studio files from visualc/VS2013 to
+     visualc/VS2017.