Move the crt objects spread around cc/library.go and cc/binary.go
into the Toolchain. This will simplify adding new toolchains that
have custom crt objects.
Test: m checkbuild
Test: go test ./cc/...
Change-Id: I7fdc1f53769799cb9c10e3e5816dabee0f918768
Move the default value for system_shared_libs out of linker.go and into
a new DefaultSharedLibraries method in Toolchain. This will simplify
adding system_shared_libs to cc_object, and adding new toolchains with
different default system_shared_libs.
Test: m checkbuild
Test: go test ./cc/...
Change-Id: I422315f090be20719c08a4d33bd39b0b26a93d6c
Host bionic and each of the device bionic architectures will share some
new toolchain functionality in common, create a toolchainBionic and embed
it into the toolchains. Use it to implement Bionic() once and change
the default implementation from true to false.
Test: go test ./cc/...
Test: m checkbuild
Change-Id: Ia34b80d9691edc4ab1cbdbd005d1ffc950d0881c
