Fix Arch package: remove subdirectory path from source=() array

makepkg cannot resolve 'src/system-sleep/converge-wake' in source=() because
it looks for just the basename. The file is still installed correctly by the
package() function which accesses it directly via cd $startdir + relative path.

PKGBUILD

@@ -17,13 +17,11 @@ source=(
     "converge.service"
     "converge-wake.service"
     "converge.example.yaml"
-    "src/system-sleep/converge-wake"
 )
 md5sums=(
     'SKIP'
     'SKIP'
     'SKIP'
-    'SKIP'
 )
 
 build() {