strace: update to 5.6.

* libunwind now available on aarch64-musl
* drop pre_configure, all fixups are long obsolete (see CHANGELOG)

srcpkgs/strace/template

@@ -1,6 +1,6 @@
 # Template file for 'strace'
 pkgname=strace
-version=5.5
+version=5.6
 revision=1
 build_style=gnu-configure
 configure_args="--with-libunwind"
@@ -10,20 +10,10 @@ maintainer="Anthony Iliopoulos <ailiop@altatus.com>"
 license="LGPL-2.1-or-later"
 homepage="https://strace.io/"
 distfiles="https://github.com/strace/strace/releases/download/v${version}/strace-${version}.tar.xz"
-checksum=9f58958c8e59ea62293d907d10572e352b582bd7948ed21aa28ebb47e5bf30ff
+checksum=189968eeae06ed9e20166ec55a830943c84374676a457c9fe010edc7541f1b01
 
 case "$XBPS_TARGET_MACHINE" in
-	aarch64-musl) configure_args=; makedepends= ;;
+	aarch64*|ppc64*) configure_args+=" --enable-mpers=no" ;;
+	# work around https://github.com/strace/strace/issues/133
+	x86_64-musl) configure_args+=" --enable-mpers=no" ;;
 esac
-
-case "$XBPS_TARGET_MACHINE" in
-	aarch64*|ppc64*) configure_args+=" --enable-mpers=no"
-esac
-
-pre_configure() {
-	sed -i -e 's/include <linux\/socket.h>/include <sys\/socket.h>/g' configure
-	sed -i -e 's/include <sgidefs.h>/include <asm\/sgidefs.h>/g' configure
-	case "$XBPS_TARGET_MACHINE" in
-		*-musl) export CFLAGS+=" -Dsigcontext_struct=sigcontext";;
-	esac
-}