[PATCH v8 17/17] xen/README: add compiler and binutils versions for RISC-V64

[Oleksii Kurochko <oleksii.kurochko@gmail.com>]

This patch doesn't represent a strict lower bound for GCC and
GNU Binutils; rather, these versions are specifically employed by
the Xen RISC-V container and are anticipated to undergo continuous
testing. Older GCC and GNU Binutils would work,
but this is not a guarantee.

While it is feasible to utilize Clang, it's important to note that,
currently, there is no Xen RISC-V CI job in place to verify the
seamless functioning of the build with Clang.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
---
Changes in V5-V8:
 - Nothing changed. Only rebase.
---
 Changes in V6:
  - update the message in README.
---
 Changes in V5:
  - update the commit message and README file with additional explanation about GCC and
    GNU Binutils version. Additionally, it was added information about Clang.
---
 Changes in V4:
  - Update version of GCC (12.2) and GNU Binutils (2.39) to the version
    which are in Xen's contrainter for RISC-V
---
 Changes in V3:
  - new patch
---
 README | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README b/README
index c8a108449e..30da5ff9c0 100644
--- a/README
+++ b/README
@@ -48,6 +48,10 @@ provided by your OS distributor:
       - For ARM 64-bit:
         - GCC 5.1 or later
         - GNU Binutils 2.24 or later
+      - For RISC-V 64-bit:
+        - GCC 12.2 or later
+        - GNU Binutils 2.39 or later
+          Older GCC and GNU Binutils would work, but this is not a guarantee.
     * POSIX compatible awk
     * Development install of zlib (e.g., zlib-dev)
     * Development install of Python 2.7 or later (e.g., python-dev)
-- 
2.44.0