libunwind: broken on aarch64-musl currently.

srcpkgs/libunwind/template

@@ -1,7 +1,7 @@
 # Template file for 'libunwind'.
 pkgname=libunwind
 version=1.2rc1
-revision=1
+revision=2
 wrksrc="${pkgname}-${version/rc/-rc}"
 build_style=gnu-configure
 hostmakedepends="libtool automake"
@@ -13,6 +13,10 @@ license="MIT"
 distfiles="http://download.savannah.gnu.org/releases/$pkgname/$pkgname-${version/rc/-rc}.tar.gz"
 checksum=d222f186b6bc60f49dac5030516ec35a7ed0ccca675551d6cf81008112116abc
 
+case "$XBPS_TARGET_MACHINE" in
+        aarch64-musl) broken="needs getcontext";;
+esac
+
 pre_configure() {
 	sed -i /SUBDIRS/s/tests// Makefile.am
 	autoreconf -fi