Add SwiftConfig.cpp to Android build.

Bug: b/216019572
Change-Id: I90078be78330a6432a7eab4cb2e0c7eabcfa07ec
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/61648
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Daniele Vettorel <dvet@google.com>
Commit-Queue: Daniele Vettorel <dvet@google.com>

src/Android.bp

diff --git a/src/Android.bp b/src/Android.bp
index 5f61aa7..a2ba384 100644
--- a/src/Android.bp
+++ b/src/Android.bp
@@ -188,6 +188,7 @@
         "System/Math.cpp",
         "System/Memory.cpp",
         "System/Socket.cpp",
+        "System/SwiftConfig.cpp",
         "System/Timer.cpp",
         "Device/*.cpp",
         "Pipeline/*.cpp",