Add 'tidb pam cert' build tag support

.SRCINFO

@@ -1,10 +1,10 @@
 # Generated by mksrcinfo v8
-# Mon Mar  7 05:43:43 UTC 2016
+# Mon Mar  7 05:52:04 UTC 2016
 pkgbase = gogs
 	pkgdesc = Gogs(Go Git Service) is a Self Hosted Git Service in the Go Programming Language.
 	pkgver = 0.9.0
 	pkgrel = 1
-	epoch = 1
+	epoch = 2
 	url = http://gogs.io/
 	install = gogs.install
 	arch = i686

PKGBUILD

@@ -5,7 +5,7 @@ pkgname=gogs
 _pkgname=${pkgname}
 pkgver=0.9.0
 pkgrel=1
-epoch=1
+epoch=2
 pkgdesc="Gogs(Go Git Service) is a Self Hosted Git Service in the Go Programming Language."
 arch=('i686' 'x86_64' 'armv6h' 'armv7h')
 url="http://gogs.io/"
@@ -84,7 +84,7 @@ build() {
 
   msg2 "Build program"
   go fix
-  go build -x -tags='sqlite'
+  go build -x -tags='sqlite tidb pam cert'
 }
 
 package() {