mtr: fix cross, fix musl

srcpkgs/mtr/template

@@ -1,7 +1,7 @@
 # Template file for 'mtr'
 pkgname=mtr
 version=0.87
-revision=1
+revision=2
 build_style="gnu-configure"
 hostmakedepends="automake pkg-config"
 makedepends="ncurses-devel gtk+-devel"
@@ -12,7 +12,11 @@ license="GPL-2"
 homepage="http://www.bitwizard.nl/mtr/"
 distfiles="https://github.com/traviscross/mtr/archive/v${version}.tar.gz"
 checksum=ac177953e7c834d5326fc52d63377b6d0b42d05db8017556390629b87e44e183
-nocross=yes
+#nocross=yes
+
+post_extract() {
+	sed -i 's/__GLIBC__/__linux__/g' configure.ac dns.c
+}
 
 pre_configure() {
 	./bootstrap.sh