src: fix typo

Signed-off-by: calciumbe <[email protected]>

Author: calciumbe

src/doc/rustc/src/platform-support/android.md

@@ -65,4 +65,4 @@ Currently the `riscv64-linux-android` target requires the following architecture
 ### aarch64-linux-android on Nightly compilers
 
 As soon as `-Zfixed-x18` compiler flag is supplied, the [`ShadowCallStack` sanitizer](https://releases.llvm.org/7.0.1/tools/clang/docs/ShadowCallStack.html)
-instrumentation is also made avaiable by supplying the second compiler flag `-Zsanitizer=shadow-call-stack`.
+instrumentation is also made available by supplying the second compiler flag `-Zsanitizer=shadow-call-stack`.