Create gupc_5_2_0_release tag.

Tagging source as tags/gcc_5_2_0_release

Tagging source as tags/gcc_4_9_3_release

Tagging source as tags/gcc_4_8_5_release

Tagging source as tags/gcc_5_1_0_release

Tagging source as tags/gcc_4_8_4_release

Tagging source as tags/gcc_4_9_2_release

Tagging source as tags/gcc_4_9_1_release

Tagging source as tags/gcc_4_7_4_release