Add vita environment (#22)

* vita: initial port

* vita: implement events, enable input thread

* vita: gethostbyname

* vita: Enable audio

* vita: Fix thread crash on discoonect process

* vita: Handle cannot create thread

* vita: now use newlib's socket apis

* vita: Refactoring for moonlight-stream/moonlight-common-c

* Fix review things

https://github.com/moonlight-stream/moonlight-common-c/pull/22#pullrequestreview-2436093

- vita may not support IPv6; so add LC_ASSERT them.
- define inet_ntop to sceNetInetNtop
- guard about failure of sceKernelCreateMutex or sceKernelCreateCond
- remove meanless macros

https://github.com/moonlight-stream/moonlight-common-c/pull/22#pullrequestreview-2444677

- !*mutex to *mutex
- remove useless LC_ASSERT then change to use inet_ntop
  in vita system not defined `sockaddr_in6`, so just use `sockaddr_in` instead this.

https://github.com/moonlight-stream/moonlight-common-c/pull/22#pullrequestreview-2445642

- define sin6_addr

src/Platform.h

@@ -9,6 +9,11 @@
 #include <Windows.h>
 #include <Winsock2.h>
 #include <ws2tcpip.h>
+#elif defined(__vita__)
+#include <unistd.h>
+#include <sys/time.h>
+#include <netinet/in.h>
+#include <psp2/kernel/threadmgr.h>
 #else
 #include <unistd.h>
 #include <pthread.h>
@@ -34,6 +39,8 @@
 void LimelogWindows(char* Format, ...);
 #define Limelog(s, ...) \
     LimelogWindows(s, ##__VA_ARGS__)
+#elif defined(__vita__)
+#define Limelog sceClibPrintf
 #else
 #define Limelog(s, ...) \
     fprintf(stderr, s, ##__VA_ARGS__)