subprojects/berkeley-testfloat-3: Update to fix a problem with compil…

…er warnings

Update the berkeley-testfloat-3 wrap to include a patch provided by
Olaf Hering. This fixes a problem with "control reaches end of non-void
function [-Werror=return-type]" compiler warning/errors that are now
enabled by default in certain versions of GCC.

Reported-by: Olaf Hering <olaf@aepfle.de>
Message-Id: <20230816091522.1292029-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

subprojects/berkeley-testfloat-3.wrap

@@ -1,5 +1,5 @@
 [wrap-git]
 url = https://gitlab.com/qemu-project/berkeley-testfloat-3
-revision = 40619cbb3bf32872df8c53cc457039229428a263
+revision = e7af9751d9f9fd3b47911f51a5cfd08af256a9ab
 patch_directory = berkeley-testfloat-3
 depth = 1