Fix test failures caused by regexp-sensitive characters in the build paths

Checkout [1] as an example of the test failures. In that particular cases, the
failures is caused by the plus sign in the path being pass unescaped
(buildd-cmake_2.8.9-1~bpo60+1-armel-3Lvkef) to the regexp.

In addition to failures in the log, the following new tests also fail in 2.8.11:

  243 - CTestTestMemcheckUnknown (Failed)
  244 - CTestTestMemcheckUnknownQuoted (Failed)
  248 - CTestTestMemcheckDummyValgrindFailPre (Failed)
  249 - CTestTestMemcheckDummyValgrindFailPost (Failed)
  250 - CTestTestMemcheckDummyPurify (Failed)
  251 - CTestTestMemcheckDummyBC (Failed)
  253 - CMake.List (Failed)

[1] https://buildd.debian.org/status/fetch.php?pkg=cmake&arch=armel&ver=2.8.9-1~bpo60%2B1&stamp=1369243896
Merge branch 'escape-regex-specials-in-path-2.8.11' into escape-regex-specials-in-path
Merge topic 'escape-regex-specials-in-path' into next

ecae92d Merge branch 'escape-regex-specials-in-path-2.8.11' into escape-regex-specials-in-path
c9b75dc Fix test failures caused by regexp-sensitive characters in the build paths