pulseaudio: fix compilation without doxygen

Meson update makes this error now.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

sound/pulseaudio/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=pulseaudio
 PKG_VERSION:=14.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://freedesktop.org/software/pulseaudio/releases

sound/pulseaudio/patches/020-doxygen.patch

+--- a/meson.build
++++ b/meson.build
+@@ -698,7 +698,6 @@ check_dep = dependency('check', version
+ 
+ # Subdirs
+ 
+-subdir('doxygen')
+ subdir('po')
+ if get_option('man')
+   subdir('man')