[android] add a module map for Android NDK

This module map covers the Bionic C standard library and other Posix headers used in the Android NDK

Author: hyp

stdlib/public/Platform/CMakeLists.txt

@@ -286,6 +286,14 @@ foreach(sdk ${SWIFT_SDKS})
                                DESTINATION "lib/swift/${arch_subdir}"
                                COMPONENT sdk-overlay)
 
+    # FIXME: Can we drop Glibc for android?
+    if ("${sdk}" STREQUAL "ANDROID")
+      swift_install_in_component(FILES
+        "android.modulemap"
+        DESTINATION "lib/swift/${arch_subdir}"
+        COMPONENT sdk-overlay)
+    endif()
+
     if(SWIFT_BUILD_STATIC_STDLIB)
       swift_install_in_component(FILES "${glibc_modulemap_out}"
                                  DESTINATION "lib/swift_static/${arch_subdir}"
@@ -345,4 +353,4 @@ if(WINDOWS IN_LIST SWIFT_SDKS)
       winsdk.modulemap
     DESTINATION "share"
     COMPONENT sdk-overlay)
-endif()
+endif()