modules/picolibc: Include clang+cmake and old GCC changes

This updates west.yml to pull the version of picolibc that includes both
the patches in #54391 as well as the fix providing compatibility for the
'deprecated' attribute when using GCC versions before 4.5, such as the GCC
based XCC compiler. Changes for 'weak' attributes were added to avoid using
inline asm statements for compilers that support the necessary attributes.

This commit is synchronized with Zephyr SDK:

zephyrproject-rtos/sdk-ng#650

Signed-off-by: Keith Packard <keithp@keithp.com>

Author: keith-packard

west.yml

@@ -207,7 +207,7 @@ manifest:
       path: modules/lib/openthread
     - name: picolibc
       path: modules/lib/picolibc
-      revision: 2097f26ce7dee36922b22ce048c09cd073ebae3d
+      revision: 0694a78fc08b3300c7db79602c46ba0a64428c8e
     - name: segger
       revision: e2ff2200556e8a8f962921444275c04971a2bb3d
       path: modules/debug/segger