Implement various SNDRV_CTL_xxx ioctls.

Patch from Ivan Sorokin via BZ#334936.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14111 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/NEWS b/NEWS
index a693111..22e6250 100644
--- a/NEWS
+++ b/NEWS
@@ -160,6 +160,7 @@
 334705  sendmsg and recvmsg should guard against bogus msghdr fields.
 334727  Build fails with -Werror=format-security
 334788  clarify doc about --log-file initial program directory
+334936  patch to fix false positives on alsa SNDRV_CTL_* ioctls
 335034  Unhandled ioctl: HCIGETDEVLIST
 335155  vgdb, fix error print statement.
 335262  arm64: movi 8bit version is not supported