root: bump version to 5.34.10; apply 6 thread safety patches

Thread safe patches from v5-34-00-patches branch:
- 98c0d99cf2999575502ed1cd2c5cb233c9062a37
- ca4eea119f2c5fed85665d7e2386cde843fbb554
- 9651eb210234ae6fd048f74f9bc4d29989c79f2f
- 2563f5f047c24201257be3077b1ccaab6117a166
- 0c40533fe73f8312944ae0f2636ede51b2a33cfb
- b5bdb586635f61817bfa14b0eba07ac5014fe602

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Merge pull request #242 from davidlt/root-5-34-10-plus-thread-safety-patches

[CMSSW_7_0_X] root: bump version to 5.34.10; apply 6 thread safety patches