android-tools: update to 5.1.0r1 (kill _ in version).

srcpkgs/android-tools/template

@@ -1,7 +1,8 @@
 # Template file for 'android-tools'
 pkgname=android-tools
-version=5.1.0_r1
-revision=3
+_version=5.1.0_r1
+version=${_version/_/}
+revision=1
 create_wrksrc=yes
 build_style=gnu-makefile
 hostmakedepends="git"
@@ -14,7 +15,7 @@ homepage="http://developer.android.com/tools/help/adb.html"
 do_fetch() {
 	local r
 	for r in system/core system/extras external/libselinux external/f2fs-tools; do
-		git clone -b android-${version} \
+		git clone -b android-${_version} \
 			https://android.googlesource.com/platform/$r \
 			${pkgname}-${version}/$(basename $r)
 	done