Compile toolchain GCC with --enable-linker-build-id to add Build ID to binaries

A "Build ID" is a unique identifier for binaries (which is a hash of the contents). Producing OS packages with separate debug symbols requires each binary to have a Build ID. This is particularly important for libstdc++, because it is produced during the native-toolchain build rather than the regular Impala build. To turn on Build IDs, one can configure that at GCC build time by specifying "--enable-linker-build-id". This causes GCC to tell the linker to compute the Build ID.

Breakpad will also use the Build ID when resolving symbols.