[CRT] Move rand to stdlib, where it belongs

sdk/lib/crt/math/math.cmake

@@ -240,17 +240,12 @@ list(APPEND CRT_MATH_SOURCE
     math/ldiv.c
     math/logf.c
     math/powf.c
-    math/rand.c
 )
 
 list(APPEND CRT_MATH_ASM_SOURCE
     ${LIBCNTPR_MATH_ASM_SOURCE}
 )
 
-list(APPEND LIBCNTPR_MATH_SOURCE
-    math/rand_nt.c
-)
-
 if(ARCH STREQUAL "i386")
     list(APPEND ATAN2_ASM_SOURCE math/i386/atan2_asm.s)
 elseif(ARCH STREQUAL "amd64")

sdk/lib/crt/stdlib/stdlib.cmake

@@ -1,10 +1,15 @@
 
-list(APPEND LIBCNTPR_STDLIB_SOURCE
+list(APPEND COMMON_STDLIB_SOURCE
     stdlib/qsort.c
 )
 
+list(APPEND LIBCNTPR_STDLIB_SOURCE
+    ${COMMON_STDLIB_SOURCE}
+    stdlib/rand_nt.c
+)
+
 list(APPEND CRT_STDLIB_SOURCE
-    ${LIBCNTPR_STDLIB_SOURCE}
+    ${COMMON_STDLIB_SOURCE}
     stdlib/_exit.c
     stdlib/_set_abort_behavior.c
     stdlib/abort.c
@@ -22,6 +27,7 @@ list(APPEND CRT_STDLIB_SOURCE
     stdlib/mbstowcs.c
     stdlib/obsol.c
     stdlib/putenv.c
+    stdlib/rand.c
     stdlib/rot.c
     stdlib/senv.c
     stdlib/swab.c