fix: Build of gtest library on Windows with MSYS2 mingw64 subsystem

Author: schuhschuh

include/basis/test.h

@@ -44,7 +44,7 @@
 #ifdef GTEST_HAS_PTHREAD
 # undef GTEST_HAS_PTHREAD
 #endif
-#if HAVE_PTHREAD
+#if HAVE_PTHREAD && !(defined(__MINGW__) || defined(__MINGW32__))
 # define GTEST_HAS_PTHREAD 1
 #else
 # define GTEST_HAS_PTHREAD 0