sddm: try to fix FS#1069.

sddm/PKGBUILD

@@ -1,9 +1,8 @@
-#contributions from Arch: 
-https://projects.archlinux.org/svntogit/packages.git/tree/trunk?h=packages/sddm
+#contributions from Arch: https://projects.archlinux.org/svntogit/packages.git/tree/trunk?h=packages/sddm
 
 pkgname=sddm
 pkgver=0.11.0
-pkgrel=5
+pkgrel=6
 pkgdesc='QML based X11 display manager'
 arch=('x86_64')
 url='http://github.com/sddm/sddm'
@@ -21,12 +20,8 @@ source=("${pkgname}-${pkgver}.tar.gz::https://github.com/${pkgname}/${pkgname}/a
 md5sums=('e110a7683867400dc9484d4744fd41dd'
          '7e4de1ad45e6a0e930b96fd051e48da4')
 
-prepare() {
-  mkdir -p build
-}
-
 build() {
-  cd build
+  mkdir -p build && cd build
   cmake ../${pkgname}-${pkgver} \
         -DCMAKE_INSTALL_PREFIX=/usr \
         -DCMAKE_BUILD_TYPE=Release \