public: build: don't confuse other libcs with built with glibc game libraries by specifying them into separate platform, like Android

public/build.c

@@ -89,6 +89,8 @@ const char *Q_PlatformStringByID( const int platform )
 		return "win32";
 	case PLATFORM_ANDROID:
 		return "android";
+	case PLATFORM_LINUX_UNKNOWN:
+		return "linuxunkabi";
 	case PLATFORM_LINUX:
 		return "linux";
 	case PLATFORM_APPLE:

public/build.h

@@ -69,6 +69,7 @@ Then you can use another oneliner to query all variables:
 #undef XASH_IRIX
 #undef XASH_JS
 #undef XASH_LINUX
+#undef XASH_LINUX_UNKNOWN
 #undef XASH_LITTLE_ENDIAN
 #undef XASH_MIPS
 #undef XASH_MOBILE_PLATFORM
@@ -98,10 +99,17 @@ Then you can use another oneliner to query all variables:
 #else // POSIX compatible
 	#define XASH_POSIX 1
 	#if defined __linux__
-		#define XASH_LINUX 1
 		#if defined __ANDROID__
 			#define XASH_ANDROID 1
+		#else
+			#include <features.h>
+			// if our system libc has features.h header
+			// try to detect it to not confuse other libcs with built with glibc game libraries
+			#if !defined __GLIBC__
+				#define XASH_LINUX_UNKNOWN 1
 			#endif
+		#endif
+		#define XASH_LINUX 1
 	#elif defined __FreeBSD__
 		#define XASH_FREEBSD 1
 	#elif defined __NetBSD__

public/buildenums.h

@@ -40,11 +40,14 @@ GNU General Public License for more details.
 #define PLATFORM_SERENITY   11
 #define PLATFORM_IRIX       12
 #define PLATFORM_NSWITCH    13
+#define PLATFORM_LINUX_UNKNOWN 14
 
 #if XASH_WIN32
 	#define XASH_PLATFORM PLATFORM_WIN32
 #elif XASH_ANDROID
 	#define XASH_PLATFORM PLATFORM_ANDROID
+#elif XASH_LINUX_UNKNOWN
+	#define XASH_PLATFORM PLATFORM_LINUX_UNKNOWN
 #elif XASH_LINUX
 	#define XASH_PLATFORM PLATFORM_LINUX
 #elif XASH_APPLE