[CRT][UCRTBASE] Add round/roundf

Author: tkreuzer

dll/win32/ucrtbase/ucrtbase.spec

@@ -2547,8 +2547,8 @@
 @ cdecl -stub rint(double)
 @ cdecl -stub rintf(float)
 @ cdecl rintl(double) rint
-@ cdecl -stub round(double)
-@ cdecl -stub roundf(float)
+@ cdecl round(double)
+@ cdecl roundf(float)
 @ cdecl roundl(double) round
 @ cdecl scalbln(double long) scalbn # double scalbln(double x, long exp);
 @ cdecl scalblnf(float long) scalbnf # float scalblnf(float x, long exp);

sdk/lib/crt/math/math.cmake

@@ -8,6 +8,8 @@ list(APPEND LIBCNTPR_MATH_SOURCE
     math/div.c
     math/exp2f.c
     math/labs.c
+    math/round.c
+    math/roundf.c
     math/sincos.c
 )