package: remove superfluous character.

package/archlinux/PKGBUILD

@@ -13,7 +13,7 @@ provides=('magnum-git')
 
 build() {
     mkdir -p "$startdir/build"
-    cd "$startdir/build/"
+    cd "$startdir/build"
 
     # Disable optimization (saves A LOT of compilation time)
     newcxxflags=$(echo $CXXFLAGS | sed s/-O.//g | sed s/-D_FORTIFY_SOURCE=.//g)

package/archlinux/PKGBUILD-mingw32

@@ -12,7 +12,7 @@ options=('!buildflags' '!strip' 'staticlibs')
 
 build() {
     mkdir -p "$startdir/build-win"
-    cd "$startdir/build-win/"
+    cd "$startdir/build-win"
 
     unset LDFLAGS
 

package/archlinux/PKGBUILD-release

@@ -13,7 +13,7 @@ options=('staticlibs')
 
 build() {
     mkdir -p "$startdir/build"
-    cd "$startdir/build/"
+    cd "$startdir/build"
 
     cmake .. \
         -DCMAKE_BUILD_TYPE=Release \