Disable some warnings in LLVM headers for GCC/clang compilers.

evmjit/libevmjit/preprocessor/llvm_includes_end.h

@@ -1,3 +1,7 @@
 #if defined(_MSC_VER)
 	#pragma warning(pop)
+#elif defined(__clang__)
+	#pragma clang diagnostic pop
+#else
+	#pragma GCC diagnostic pop
 #endif

evmjit/libevmjit/preprocessor/llvm_includes_start.h

@@ -1,4 +1,12 @@
 #if defined(_MSC_VER)
 	#pragma warning(push)
 	#pragma warning(disable: 4267 4244 4800)
+#elif defined(__clang__)
+	#pragma clang diagnostic push
+	#pragma clang diagnostic ignored "-Wunused-parameter"
+	#pragma clang diagnostic ignored "-Wconversion"
+#else
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wunused-parameter"
+	#pragma GCC diagnostic ignored "-Wconversion"
 #endif