[android][test] Fix new C++ interop test on Android armv7 and new IRGen test, and disable CxxToSwiftToCxx bridging test that now fails on Android

Also, make the analogous change to swiftlang/swift-driver#1372, which gets the
sanitizer tests working on Android again.

Author: finagolfin

lib/Driver/ToolChains.cpp

@@ -1459,9 +1459,11 @@ void ToolChain::getClangLibraryPath(const ArgList &Args,
   getResourceDirPath(LibPath, Args, /*Shared=*/true);
   // Remove platform name.
   llvm::sys::path::remove_filename(LibPath);
-  llvm::sys::path::append(LibPath, "clang", "lib",
-                          T.isOSDarwin() ? "darwin"
-                                         : getPlatformNameForTriple(T));
+  auto platformName =
+      T.isOSDarwin() ? "darwin" : getPlatformNameForTriple(Triple);
+  if (platformName == "android")
+    platformName = "linux";
+  llvm::sys::path::append(LibPath, "clang", "lib", platformName);
 }
 
 /// Get the runtime library link path, which is platform-specific and found

test/IRGen/section.swift

@@ -38,6 +38,8 @@
 // ASM-NOT: .section
 // ASM: $s7section3fooyyF:
 // ASM-linux-gnu: .section{{.*}}__TEXT,__mysection
+// ASM-linux-android: .section{{.*}}__TEXT,__mysection
+// ASM-linux-androideabi: .section{{.*}}__TEXT,__mysection
 // ASM-NOT: .section
 // ASM: $s7section2g0Sivp:
 // ASM-NOT: .section

test/Interop/CxxToSwiftToCxx/bridge-cxx-struct-back-to-cxx.swift

@@ -20,6 +20,8 @@
 
 // RUN: %target-interop-build-clangxx -fsyntax-only -x c++-header %t/full-cxx-swift-cxx-bridging.h -std=gnu++20 -c -fmodules -fcxx-modules -I %t
 
+// XFAIL: OS=linux-android, OS=linux-androideabi
+
 //--- header.h
 
 struct Trivial {