libuv: Supress warnings on latest android ndk

There are several warnings of various forms which can be supressed

```
android-ndk-r9b/platforms/android-19/arch-x86/usr/
                                        include/sys/stat.h:45:19
warning: ISO C90 does not support 'long long' [-Wlong-long]

android-ndk-r9b/platforms/android-19/arch-x86/usr/
                                    include/asm-generic/siginfo.h:58:7
warning: ISO C forbids zero-size array '_pad' [-Wpedantic]

android-ndk-r9b/platforms/android-19/arch-x86/usr/
                                    include/linux/tcp.h:24:2
warning: type of bit-field 'res1' is a GCC extension [-Wpedantic]

android-ndk-r9b/platforms/android-19/arch-x86/usr/
                                    include/linux/compiler.h:25:31
warning:ISO C does not permit named variadic macros[-Wvariadic-macros]
```