[NDK] Remove old gdb build script

Test: build
Change-Id: If722b485870c9fce253237707e8f4d7a106dc215
2 files changed
tree: a882a0468efe7183c1458aacfe23a1215da60573
  1. gdb-7.11/
  2. gdb-8.0.1/
  3. gdb-8.2/
  4. gdb-8.3/