swiftshader_reactor_base doesn't need to depend on
swiftshader_opengl_common. This causes failures when building for
Vulkan. Instead make swiftshader_libGLESv2_static depend on it
directly.

Bug: chromium:967704
Change-Id: I4c62c975c72ad42ee0a5cd59e58bd840ad8ab71e
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32068Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Saman Sami <samans@chromium.org>