audio/jack-example-tools: Update to 4 release.

ChangeLog: https://github.com/jackaudio/jack-example-tools/releases/tag/4

 * Fix a typo in alsa_in manpage
 * Fix source-code comments and manpage for jack_simple_client
 * Remove includes of non-standard alloca.h header

PR:		269414
Reported by:	dev@submerge.ch (maintainer)

audio/jack-example-tools/Makefile

@@ -1,5 +1,5 @@
 PORTNAME=	jack-example-tools
-DISTVERSION=	3
+DISTVERSION=	4
 CATEGORIES=	audio
 
 MAINTAINER=	dev@submerge.ch
@@ -40,11 +40,4 @@ READLINE_USES=		readline
 READLINE_MESON_ENABLED=	readline_support
 READLINE_LDFLAGS=	-lreadline
 
-.include <bsd.port.pre.mk>
-
-# The alloca.h header is not available on FreeBSD. Upstream knows:
-# https://github.com/jackaudio/jack-example-tools/pull/56
-post-extract:
-	@${TOUCH} ${WRKSRC}/tools/alloca.h
-
-.include <bsd.port.post.mk>
+.include <bsd.port.mk>

audio/jack-example-tools/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1651427119
-SHA256 (jackaudio-jack-example-tools-3_GH0.tar.gz) = 661a95d43c276d444b03756564ceaa3b53a2a0b78c8147631383f31fa85135c6
-SIZE (jackaudio-jack-example-tools-3_GH0.tar.gz) = 125686
+TIMESTAMP = 1675341101
+SHA256 (jackaudio-jack-example-tools-4_GH0.tar.gz) = 2b1e0dc3cb3b5bfb0423f0aeb21eb611437cf71ee0ace2ca199f05f02705f174
+SIZE (jackaudio-jack-example-tools-4_GH0.tar.gz) = 125676