packer: update to 0.12.0.

srcpkgs/packer/template

@@ -1,6 +1,6 @@
 # Template file for 'packer'
 pkgname=packer
-version=0.11.0
+version=0.12.0
 revision=1
 replaces="packer-bin>=0"
 short_desc="Create identical multiplatform machine images from a single source"
@@ -11,7 +11,7 @@ license="MPL-2"
 homepage="http://www.packer.io"
 go_import_path="github.com/mitchellh/packer"
 distfiles="https://${go_import_path}/archive/v${version}.tar.gz"
-checksum=6e217b863a5b030fb92e019d3ba47c71fca641daa72f1ed8f2a0327a95bac266
+checksum=5b222051007b24e502c7cbf19ea30a0201b7a0939ab2c81f649690df1fddf8a5
 
 post_build() {
 	for F in $(find -type f -name main.go); do