Add incomplet long double math support to libmingwex.a

winsup/mingw/mingwex/math/lrintl.c

@@ -0,0 +1,10 @@
+#include <math.h>
+
+long lrintl (long double x) 
+{
+  long retval;
+  __asm__ __volatile__							      \
+    ("fistpl %0"  : "=m" (retval) : "t" (x) : "st");				      \
+  return retval;
+}
+