valgrind: make this build on linux-[0-9]*; re-add armv7 host detection.

srcpkgs/valgrind/patches/linux-99999.patch

@@ -0,0 +1,11 @@
+--- configure.orig	2015-05-10 21:13:43.957032176 +0200
++++ configure	2015-05-10 21:13:54.365150623 +0200
+@@ -5553,7 +5553,7 @@ $as_echo_n "checking for the kernel vers
+         kernel=`uname -r`
+ 
+         case "${kernel}" in
+-             2.6.*|3.*)
++             2.6.*|[3-9].*)
+         	    { $as_echo "$as_me:${as_lineno-$LINENO}: result: 2.6.x/3.x family (${kernel})" >&5
+ $as_echo "2.6.x/3.x family (${kernel})" >&6; }
+ 

srcpkgs/valgrind/template

@@ -15,6 +15,10 @@ license="GPL-2"
 distfiles="http://www.valgrind.org/downloads/${pkgname}-${version}.tar.bz2"
 checksum=fa253dc26ddb661b6269df58144eff607ea3f76a9bcfe574b0c7726e1dfcb997
 
+if [ "$XBPS_TARGET_MACHINE" = "armv7l" ]; then
+	configure_args+=" ac_cv_host=armv7l-unknown-linux-gnueabihf"
+fi
+
 valgrind-devel_package() {
 	depends="valgrind>=${version}"
 	short_desc+=" - development files"