[android] Disable a couple Reflection tests and fix an install path (swiftlang#82620)

The tests broke on the community Android CI since swiftlang#82325, and I just
noticed the install issue when cross-compiling Testing with a
freshly-built compiler, which I'd never done before. Also, fix the NDK
path shown in the CMake output.

Author: finagolfin

cmake/modules/SwiftConfigureSDK.cmake

@@ -53,7 +53,7 @@ function(_report_sdk prefix)
     endforeach()
   elseif("${prefix}" STREQUAL "ANDROID")
     if(NOT "${SWIFT_ANDROID_NDK_PATH}" STREQUAL "")
-      message(STATUS " NDK: $ENV{SWIFT_ANDROID_NDK_PATH}")
+      message(STATUS " NDK: ${SWIFT_ANDROID_NDK_PATH}")
     endif()
     if(NOT "${SWIFT_ANDROID_NATIVE_SYSROOT}" STREQUAL "")
       message(STATUS " Sysroot: ${SWIFT_ANDROID_NATIVE_SYSROOT}")

test/Reflection/conformance_descriptors.swift

@@ -5,6 +5,7 @@
 //
 // Temporarily disable on AArch64 Linux (rdar://88451721)
 // UNSUPPORTED: OS=linux-gnu && CPU=aarch64
+// XFAIL: OS=linux-android
 
 // rdar://100558042
 // UNSUPPORTED: CPU=arm64e

test/Reflection/typeref_decoding.swift

@@ -10,6 +10,7 @@
 
 // FIXME: rdar://127796117
 // UNSUPPORTED: OS=linux-gnu && CPU=aarch64
+// XFAIL: OS=linux-android
 
 // RUN: %target-build-swift -target %target-swift-5.2-abi-triple -Xfrontend -enable-anonymous-context-mangled-names %S/Inputs/ConcreteTypes.swift %S/Inputs/GenericTypes.swift %S/Inputs/Protocols.swift %S/Inputs/Extensions.swift %S/Inputs/Closures.swift -parse-as-library -emit-module -emit-library %no-fixup-chains -module-name TypesToReflect -o %t/%target-library-name(TypesToReflect)
 // RUN: %target-build-swift -target %target-swift-5.2-abi-triple -Xfrontend -enable-anonymous-context-mangled-names %S/Inputs/ConcreteTypes.swift %S/Inputs/GenericTypes.swift %S/Inputs/Protocols.swift %S/Inputs/Extensions.swift %S/Inputs/Closures.swift %S/Inputs/main.swift -emit-module -emit-executable %no-fixup-chains -module-name TypesToReflect -o %t/TypesToReflect

utils/swift_build_support/swift_build_support/products/product.py

@@ -212,7 +212,7 @@ def install_toolchain_path(self, host_target):
         if self.args.cross_compile_hosts:
             if self.is_darwin_host(host_target):
                 install_destdir = self.host_install_destdir(host_target)
-            else:
+            elif self.args.cross_compile_append_host_target_to_destdir:
                 install_destdir = os.path.join(install_destdir, self.args.host_target)
         return targets.toolchain_path(install_destdir,
                                       self.args.install_prefix)