Fix ar path in ARMV7 Darwin NDK build on Azure (#3473)

* Adjust ar commad in ARMV7 Darwin NDK build after homebrew update to NDK 23b

azure-pipelines.yml

@@ -220,7 +220,7 @@ jobs:
       brew update
       brew install --cask android-ndk
       export ANDROID_NDK_HOME=/usr/local/share/android-ndk
-      make TARGET=ARMV7 ONLY_CBLAS=1 CC=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/bin/armv7a-linux-androideabi21-clang AR=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-ar HOSTCC=gcc ARM_SOFTFP_ABI=1 -j4
+      make TARGET=ARMV7 ONLY_CBLAS=1 CC=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/bin/armv7a-linux-androideabi21-clang AR=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ar HOSTCC=gcc ARM_SOFTFP_ABI=1 -j4
 
 - job: OSX_IOS_ARMV8
   pool: