protobuf: actually add the patch...

srcpkgs/protobuf/patches/musl-fix.patch

@@ -0,0 +1,24 @@
+seems like both musl libc and android has byteswap.h
+
+diff --git a/src/google/protobuf/stubs/port.h b/src/google/protobuf/stubs/port.h
+index 376be5f..21223f4 100644
+--- src/google/protobuf/stubs/port.h
++++ src/google/protobuf/stubs/port.h
+@@ -87,7 +87,7 @@
+ #include <stdlib.h>  // NOLINT(build/include)
+ #elif defined(__APPLE__)
+ #include <libkern/OSByteOrder.h>
+-#elif defined(__GLIBC__) || defined(__CYGWIN__)
++#elif defined(__linux__) || defined(__CYGWIN__)
+ #include <byteswap.h>  // IWYU pragma: export
+ #endif
+ 
+@@ -299,7 +299,7 @@ inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64 v) {
+ #define bswap_32(x) OSSwapInt32(x)
+ #define bswap_64(x) OSSwapInt64(x)
+ 
+-#elif !defined(__GLIBC__) && !defined(__CYGWIN__)
++#elif !defined(__linux__) && !defined(__CYGWIN__)
+ 
+ static inline uint16 bswap_16(uint16 x) {
+   return static_cast<uint16>(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8));