Use mktemp for tempdir creation in prefetchers.

Dependencies

• [2] GRS3VARK I should sleep... grmbl
• [3] KX5L74EY add nix-prefetch- scripts for now, were externals in svn
• [4] 6FSI5OJL remove .hg-archival.txt in nix-prefetch-hg

Change contents

• replacement in src/script/nix-prefetch-bzr at line 46
  [3.1039]→[3.1039:1125](∅→∅)
  − tmpPath=/tmp/bzr-checkout-tmp-$$

  − tmpFile=$tmpPath/$dstFile

  − mkdir $tmpPath
  [3.1039]

  [3.1125]
  + tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/bzr-checkout-tmp-XXXXXXXX")"

  + trap "rm -rf \"$tmpPath\"" EXIT
• replacement in src/script/nix-prefetch-bzr at line 49
  [3.1126]→[3.1126:1158](∅→∅)
  − trap "rm -rf $tmpPath" EXIT
  [3.1126]

  [3.1158]
  + tmpFile="$tmpPath/$dstFile"
• replacement in src/script/nix-prefetch-git at line 240
  [2.5777]→[2.5777:5880](∅→∅)
  − tmpPath=/tmp/git-checkout-tmp-$$

  − tmpFile=$tmpPath/git-export

  − mkdir $tmpPath $tmpFile
  [2.5777]

  [2.5880]
  + tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/git-checkout-tmp-XXXXXXXX")"

  + trap "rm -rf \"$tmpPath\"" EXIT
• replacement in src/script/nix-prefetch-git at line 243
  [2.5881]→[2.5881:5915](∅→∅)
  − trap "rm -rf $tmpPath" EXIT
  [2.5881]

  [2.5915]
  + tmpFile="$tmpPath/git-export"

  + mkdir "$tmpFile"
• replacement in src/script/nix-prefetch-hg at line 38
  [3.9307]→[3.9307:9397](∅→∅)
  − tmpPath=/tmp/hg-checkout-tmp-$$

  − tmpArchive=$tmpPath/hg-archive

  − mkdir $tmpPath
  [3.9307]

  [3.9397]
  + tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/hg-checkout-tmp-XXXXXXXX")"

  + trap "rm -rf \"$tmpPath\"" EXIT
• replacement in src/script/nix-prefetch-hg at line 41
  [3.9398]→[3.9398:9430](∅→∅)
  − trap "rm -rf $tmpPath" EXIT
  [3.9398]

  [3.9430]
  + tmpArchive="$tmpPath/hg-archive"