Android: Add placeholders for compiler/abi-specific settings

The Android NDK source repository at

  https://android.googlesource.com/platform/ndk.git

has `<ndk>/build/core/toolchains/*/setup.mk` files that store tables of
information for their build system.  Add an equivalent file for each
compiler/abi combination.

Modules/Platform/Android-Clang.cmake

@@ -36,6 +36,8 @@ endif()
 
 include(Platform/Android-Common)
 
+include(Platform/Android/abi-${CMAKE_ANDROID_ARCH_ABI}-Clang)
+
 macro(__android_compiler_clang lang)
   __android_compiler_common(${lang})
 endmacro()

Modules/Platform/Android-GNU.cmake

@@ -36,6 +36,8 @@ endif()
 
 include(Platform/Android-Common)
 
+include(Platform/Android/abi-${CMAKE_ANDROID_ARCH_ABI}-GNU)
+
 macro(__android_compiler_gnu lang)
   __android_compiler_common(${lang})
 endmacro()

Modules/Platform/Android/abi-arm64-v8a-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/aarch64-linux-android-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-arm64-v8a-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/aarch64-linux-android-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-armeabi-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-armeabi-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-armeabi-v6-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-armeabi-v6-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-armeabi-v7a-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-armeabi-v7a-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/arm-linux-androideabi-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-common-Clang.cmake

@@ -0,0 +1 @@
+include(Platform/Android/abi-common)

Modules/Platform/Android/abi-common-GNU.cmake

@@ -0,0 +1 @@
+include(Platform/Android/abi-common)

Modules/Platform/Android/abi-mips-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/mipsel-linux-android-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-mips-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/mipsel-linux-android-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-mips64-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/mips64el-linux-android-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-mips64-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/mips64el-linux-android-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-x86-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/x86-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-x86-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/x86-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)

Modules/Platform/Android/abi-x86_64-Clang.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/x86_64-clang/setup.mk
+include(Platform/Android/abi-common-Clang)

Modules/Platform/Android/abi-x86_64-GNU.cmake

@@ -0,0 +1,2 @@
+# <ndk>/build/core/toolchains/x86_64-4.9/setup.mk
+include(Platform/Android/abi-common-GNU)