fix(build): use DWARF 4 when building debug

GCC 11 and Clang 14 now use the DWARF 5 standard by default however
Arm-DS currently only supports up to version 4. Therefore, for debug
builds, ensure the DWARF 4 standard is used.
Also update references for Arm DS-5 to it's successor Arm-DS (Arm
Development Studio).

Change-Id: Ica59588de3d121c1b795b3699f42c31f032cee49
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
diff --git a/docs/getting_started/prerequisites.rst b/docs/getting_started/prerequisites.rst
index c625090..0b8a71c 100644
--- a/docs/getting_started/prerequisites.rst
+++ b/docs/getting_started/prerequisites.rst
@@ -7,7 +7,6 @@
 It may possible to build |TF-A| with combinations of software packages that are
 different from those listed below, however only the software described in this
 document can be officially supported.
-
 Build Host
 ----------
 
@@ -71,7 +70,7 @@
    source files (``.dts`` files). DTC is available for Linux through the package
    repositories of most distributions.
 
-- Arm `Development Studio 5 (DS-5)`_
+- Arm `Development Studio (Arm-DS)`_
 
    The standard software package used for debugging software on Arm development
    platforms and |FVP| models.
@@ -166,5 +165,5 @@
 .. _Gerrit Code Review: https://www.gerritcodereview.com/
 .. _Linaro Release Notes: https://community.arm.com/dev-platforms/w/docs/226/old-release-notes
 .. _Linaro instructions: https://community.arm.com/dev-platforms/w/docs/304/arm-reference-platforms-deliverables
-.. _Development Studio 5 (DS-5): https://developer.arm.com/products/software-development-tools/ds-5-development-studio
+.. _Development Studio (Arm-DS): https://developer.arm.com/Tools%20and%20Software/Arm%20Development%20Studio
 .. _Linaro Release 20.01: http://releases.linaro.org/members/arm/platforms/20.01