Remove Generated NDK Artifacts

Summary: These files are generated by Android Gradle Plugin doing the CMake build. Remove the generated files and add to the .gitignore (this looks to also be used by hg).

Reviewed By: javache

Differential Revision: D40169828

fbshipit-source-id: e0b7d907474aab5fcdb1a2ab33d46fdee6feed45

lib/fb/.cxx/abi_configuration_3x6d4s5q.json

@@ -1,14 +0,0 @@
-{
-  "allAbis": [
-    "armeabi-v7a",
-    "arm64-v8a",
-    "x86",
-    "x86_64"
-  ],
-  "validAbis": [
-    "ARMEABI_V7A",
-    "ARM64_V8A",
-    "X86",
-    "X86_64"
-  ]
-}

lib/fb/.cxx/abi_configuration_3x6d4s5q_key.json

@@ -1,23 +0,0 @@
-{
-  "ndkHandlerSupportedAbis": [
-    "ARMEABI_V7A",
-    "ARM64_V8A",
-    "X86",
-    "X86_64"
-  ],
-  "ndkHandlerDefaultAbis": [
-    "ARMEABI_V7A",
-    "ARM64_V8A",
-    "X86",
-    "X86_64"
-  ],
-  "externalNativeBuildAbiFilters": [],
-  "ndkConfigAbiFilters": [
-    "armeabi-v7a",
-    "x86_64",
-    "x86",
-    "arm64-v8a"
-  ],
-  "splitsFilterAbis": [],
-  "ideBuildOnlyTargetAbi": true
-}

lib/fb/.cxx/ndk_locator_record_2w3j676q.json

@@ -1,11 +0,0 @@
-{
-  "ndk": "/opt/android_sdk/ndk/21.4.7075529",
-  "revision": {
-    "mMajor": 21,
-    "mMinor": 4,
-    "mMicro": 7075529,
-    "mPreview": 0,
-    "mPrecision": "MICRO",
-    "mPreviewSeparator": " "
-  }
-}

lib/fb/.cxx/ndk_locator_record_2w3j676q_key.json

@@ -1,8 +0,0 @@
-{
-  "sdkFolder": "/opt/android_sdk",
-  "sideBySideNdkFolderNames": [
-    "21.4.7075529",
-    "21.3.6528147",
-    "21.1.6352462"
-  ]
-}