valgrind: does not run on <armv7, so explictly refuse to build on armv6l for now.

srcpkgs/valgrind/patches/armv6.patch

@@ -1,11 +0,0 @@
---- configure
-+++ configure
-@@ -5279,7 +5279,7 @@
-         ARCH_MAX="s390x"
-         ;;
- 
--     armv7*)
-+     arm*)
- 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ok (${host_cpu})" >&5
- $as_echo "ok (${host_cpu})" >&6; }
- 	ARCH_MAX="arm"

srcpkgs/valgrind/template

@@ -2,6 +2,7 @@
 pkgname=valgrind
 version=3.8.1
 revision=3
+only_for_archs="i686 x86_64"
 subpackages="${pkgname}-devel"
 build_style=gnu-configure
 configure_args="--enable-tls --with-mpicc=/dev/null"