GN: Fix incorrect android toolchain value for arm64 and mips64el

build/toolchain/android/BUILD.gn

Index: build/toolchain/android/BUILD.gn
diff --git a/build/toolchain/android/BUILD.gn b/build/toolchain/android/BUILD.gn
index 66c9a06f16da33016a0a89ffb80d3e240630a857..c2b82f3f258b9d2739d1c33d5ce1cbc2a91da1de 100644
--- a/build/toolchain/android/BUILD.gn
+++ b/build/toolchain/android/BUILD.gn
@@ -111,7 +111,7 @@ android_gcc_toolchains_helper("arm64") {
   android_ndk_sysroot = "$android_ndk_root/$arm64_android_sysroot_subdir"
   android_ndk_lib_dir = "usr/lib"
 
-  tool_prefix = "$arm64_android_toolchain_root/bin/arm-linux-androideabi-"
+  tool_prefix = "$arm64_android_toolchain_root/bin/aarch64-linux-android-"
   toolchain_cpu = "aarch64"
 }
 
@@ -119,6 +119,6 @@ android_gcc_toolchains_helper("mips64el") {
   android_ndk_sysroot = "$android_ndk_root/$mips64_android_sysroot_subdir"
   android_ndk_lib_dir = "usr/lib64"
 
-  tool_prefix = "$mips64_android_toolchain_root/bin/mipsel-linux-android-"
+  tool_prefix = "$mips64_android_toolchain_root/bin/mips64el-linux-android-"
   toolchain_cpu = "mipsel64el"
 }